CN109030842B - A kind of nutrients in sea water in-situ study device - Google Patents
A kind of nutrients in sea water in-situ study device Download PDFInfo
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- CN109030842B CN109030842B CN201810904083.5A CN201810904083A CN109030842B CN 109030842 B CN109030842 B CN 109030842B CN 201810904083 A CN201810904083 A CN 201810904083A CN 109030842 B CN109030842 B CN 109030842B
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- 238000011065 in-situ storage Methods 0.000 title claims abstract description 39
- 239000013535 sea water Substances 0.000 title claims abstract description 39
- 235000015097 nutrients Nutrition 0.000 title claims abstract description 28
- 239000007788 liquid Substances 0.000 claims abstract description 92
- 238000005259 measurement Methods 0.000 claims abstract description 69
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 52
- 238000001914 filtration Methods 0.000 claims abstract description 37
- 238000006243 chemical reaction Methods 0.000 claims abstract description 33
- 238000005070 sampling Methods 0.000 claims abstract description 28
- 238000004737 colorimetric analysis Methods 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 239000012530 fluid Substances 0.000 claims abstract description 5
- 150000003839 salts Chemical class 0.000 claims description 33
- 230000008878 coupling Effects 0.000 claims description 28
- 238000010168 coupling process Methods 0.000 claims description 28
- 238000005859 coupling reaction Methods 0.000 claims description 28
- 230000003287 optical effect Effects 0.000 claims description 27
- 239000013307 optical fiber Substances 0.000 claims description 24
- 239000002699 waste material Substances 0.000 claims description 17
- 238000003860 storage Methods 0.000 claims description 14
- 238000004458 analytical method Methods 0.000 claims description 13
- 230000007797 corrosion Effects 0.000 claims description 12
- 238000005260 corrosion Methods 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
- 238000012544 monitoring process Methods 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 9
- 238000010249 in-situ analysis Methods 0.000 claims description 9
- 238000005245 sintering Methods 0.000 claims description 9
- 230000000050 nutritive effect Effects 0.000 claims description 7
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 238000001228 spectrum Methods 0.000 claims description 6
- 229910000619 316 stainless steel Inorganic materials 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims description 4
- 239000003086 colorant Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 238000002955 isolation Methods 0.000 abstract 1
- 210000001503 joint Anatomy 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 7
- 238000012625 in-situ measurement Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910052729 chemical element Inorganic materials 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/02—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor using a plurality of sample containers moved by a conveyor system past one or more treatment or analysis stations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
Abstract
The invention discloses a kind of nutrients in sea water in-situ study devices, including measure control and photoelectric conversion module, take sampling module, power supply module, underwater in-situ filtering module, reagent and standard specimen memory module and colorimetric analysis measurement module；Underwater in-situ filtering module and plunger pump are installed in the first cabin, colorimetric analysis measurement module, full-automatic selection valve head and reagent and standard specimen memory module are mounted in the second cabin, power supply module, measurement control and photoelectric conversion module are mounted in third cabin, and mutually isolation seals between two adjacent cabins and all liquid flow path and connector are external except cabin.The present apparatus has done specific division to Light Electrical and liquid channel system, the all sealing assembly of light, electrically and mechanically rotating part, fluid path part is all placed outside in water environment, pipeline breaking, the interface loosening occurred when even if accident occurs leads to liquid leakage, and apparatus subject Light Electrical part is still very safe.
Description
Technical Field
The invention relates to a seawater analysis device, in particular to a seawater nutrient salt in-situ analysis device.
Background
Nutritive salts such as N, P, Si in seawater are the basis of marine food chain, and the research on the content or distribution characteristics of the nutritive salts in seawater is the basis of the research on the geochemical cycle process of marine organisms.
At present, the detection of the seawater nutrient salt mainly adopts on-site sampling and is carried back to a ship or a shore station laboratory for pretreatment and measurement, the method has low working efficiency, the sample is easy to pollute, the long-time sequence monitoring of the nutrient salt in the seawater is difficult to realize, and the detection method is particularly not good at all for deep and far sea ecological environment monitoring and early warning of time sequence. In recent years, with the continuous development and progress of ocean monitoring technology, the detection technology for nutritive salt in seawater is gradually going from laboratory to on-site on-line to in-situ measurement, and in our country, the research on the in-situ detection technology for nutritive salt is still in the beginning stage, and the mature technology is still blank up to now. With the continuous deep understanding of the ocean, the technology for in-situ measurement of the seawater nutrient salt in China pays attention to the technology, but the technology is not mature.
Patent document CN206863042U discloses a portable seawater nutrient salt full-automatic analysis device, which is based on a national standard wet chemical colorimetric measurement method, however, the liquefaction path and the electronic system of the device are sealed in a watertight manner inside the system, and the device is easily destroyed by seawater or reagent leakage. In addition, most of the conventional colorimetric measurement sample pools adopt traditional cuvettes, so that the consumption of reagents and samples is high, the light attenuation is strong, and the detection sensitivity is low.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a seawater nutrient salt in-situ analysis device with high use safety
In order to achieve the purpose, the technical scheme of the invention is as follows:
an in-situ analysis device for seawater nutritive salt comprises a measurement control and photoelectric conversion module, a sampling and selecting module, a power supply module, an underwater in-situ filtering module, a reagent and standard sample storage module and a colorimetric analysis and measurement module; wherein,
the power supply module is respectively and electrically connected with the measurement control and photoelectric conversion module and the sampling and selecting module to provide electric quantity for the work of the measurement control and photoelectric conversion module and the sampling and selecting module;
the measurement control and photoelectric conversion module comprises a measurement control unit and a photoelectric conversion unit;
the underwater in-situ filtering module is used for filtering the collected seawater;
the sampling and selecting module is communicated with the underwater in-situ filtering module and is used for sampling the filtered seawater; the sampling and selecting module is also in signal connection with the measurement control unit, and the measurement control unit controls the working of the sampling and selecting module;
the reagent and standard sample storage module consists of a plurality of reagent boxes and standard sample boxes, and the sample taking and selecting module is communicated with the reagent boxes and the standard sample boxes through liquid paths so as to transmit the reagents and the samples to the sample taking and selecting module;
the colorimetric analysis measuring module is communicated with the sample taking and selecting module through a liquid path and is used for measuring and analyzing the sample taken by the sample taking and selecting module; the photoelectric conversion unit is connected with the colorimetric analysis and measurement module to provide light quantity for the operation of the colorimetric analysis and measurement module;
the sample taking and selecting module comprises a plunger pump and a full-automatic selection valve head, the plunger pump is used for pumping filtered seawater, reagents, standard samples and the like in the kit to the full-automatic selection valve head, and a plurality of liquid path connectors are arranged outside the full-automatic selection valve head.
The underwater in-situ filtering module and the plunger pump are arranged in a first cabin body, the colorimetric analysis and measurement module, the full-automatic selection valve head and the reagent and standard sample storage module are arranged in a second cabin body, and the power supply module, the measurement control module and the photoelectric conversion module are arranged in a third cabin body; the first cabin body, the second cabin body and the third cabin body are vertically arranged from low to high in sequence, the two adjacent cabin bodies are isolated and sealed from each other, and all the liquid flow paths and the joints are externally arranged outside the cabin bodies.
A watertight cable joint for power supply and communication with an upper computer is arranged on the upper end cover of the third cabin body; an optical fiber or signal cable sealing joint group for transmitting photoelectric signals is installed in the lower end cover of the third cabin body, and a power supply cable sealing joint group of the sampling module is also installed in the lower end cover of the third cabin body.
Liquid outlets of the kit and the standard box are connected with a liquid path joint externally arranged on the full-automatic valve selecting head through a male-female through plate sleeve buckle joint; the male/female end of the male/female threading plate sleeve buckle joint is connected with the liquid outlet of the reagent kit and the sample box, the female/male end of the male/female threading plate sleeve buckle joint is communicated with a liquid path joint with an external full-automatic selection valve head through a corrosion-resistant hose, the male/female threading plate sleeve buckle is disconnected, the liquid path is cut off, the reagent kit and the sample box are in a closed state, the male/female threading plate sleeve buckle is communicated, the liquid path is communicated, and reagents in the reagent kit are communicated with the full-automatic selection valve head; the kit and the standard sample box are both made of shading materials and have different surface colors.
The lower ends of the kit and the standard sample box are respectively provided with a connector mounting plate, and the connector mounting plate is provided with a male-female penetrating plate sleeve buckle connector mounting screw hole, a mounting fixing rod, an automatic sample taking and selecting module fixing hole and a cable through hole.
The colorimetric analysis and measurement module comprises a colorimetric measurement sample pool; the colorimetric measurement sample pool is composed of a liquid core waveguide tube and Z-shaped light-liquid coupling joints assembled at two ends of the liquid core waveguide tube, the length of the liquid core waveguide tube can be adjusted at will according to needs, and the diameter of the liquid core waveguide tube can be adjusted within the range of 1500 um; the light-liquid coupling port of the light-liquid coupling joint is designed in a watertight structure.
The photoelectric conversion unit consists of an optical fiber, a light source power supply control subunit and an optical fiber input type spectrum monitoring subunit, wherein the optical fiber is inserted into an optical output port of the optical-liquid coupling joint, and a colorimetric photometric signal is connected into the optical fiber input type spectrum monitoring subunit through optical communication; and an optical input port in the optical-liquid coupling joint is connected with an optical fiber in an inserting mode so as to guide optical energy output by the optical fiber into the colorimetric measurement sample pool through the optical fiber.
The photoelectric conversion unit consists of a light source power supply control subunit and an analog electric signal processing subunit; installing a photoelectric detector at the optical output port of the optical-liquid coupling joint, performing photoelectric detection on the colorimetric photometric signal, and connecting the photoelectric detection signal into the analog electric signal processing subunit through electric connection; and a light source is arranged at the light input port of the light-liquid coupling joint, and the light source is electrically connected with the light source power supply control subunit for power supply control.
The power supply control module is a magnetic control switch so as to control the power supply process in a non-contact way through an external magnet.
The underwater in-situ filtering module consists of an outer filtering net and an inner filtering core, wherein the outer filtering net is formed by sintering titanium powder or 316 stainless steel powder, the inner filtering core is formed by a sintering rod with a pore diameter, and the pore diameter of the outer filtering net is larger than that of the sintering rod; the sintered rod is titanium powder or 16 stainless steel powder or copper powder.
The liquid way input joint of the Z-shaped light-liquid coupling joint in the water inlet of the colorimetric measurement sample pool is in watertight connection with one channel in the external plurality of joints of the full-automatic selection valve head through a corrosion-resistant pipeline, the liquid way output joint of the Z-shaped light-liquid coupling joint at the water outlet of the colorimetric measurement sample pool is in watertight connection with the waste liquid collection bag through a corrosion-resistant waste discharge pipeline, and the waste liquid collection bag is higher than the colorimetric analysis and measurement module so as to realize smooth exhaust and waste discharge.
Compared with the prior art, the invention has the beneficial effects that:
1. the seawater nutrient salt in-situ measuring device provided by the invention has the advantages that the optical, mechanical and hydraulic systems are clearly divided, the optical, electrical and mechanical rotating parts are completely sealed and assembled, the hydraulic parts are completely externally arranged in a water environment, even if liquid leakage is caused by pipeline breakage and interface looseness during accidents, the optical, mechanical and electrical parts on the instrument theme are still very safe, and the device is an enlarged advantage and breakthrough for wet chemical analysis.
2. The invention has compact and flexible structural design and easy disassembly and assembly, the measurement process can be completed in situ fully automatically by combining with the physicochemical environment of the sample, and only the light source needs to be replaced; the method can be used for in-situ measurement of various heavy metals, nutrient salts and other environmental parameters, and has wide application market and good application prospect.
3. The sample cell adopted by the invention has high sensitivity, wide application range and small dosage of samples and reagents, is very suitable for underwater long-time sequence in-situ monitoring and early warning, and can realize high-sensitivity detection of chemical elements such as nutrient salt with extremely low concentration and wide dynamic range by adjusting the length of the sample cell.
Drawings
Fig. 1 is a schematic structural diagram of an in-situ analysis apparatus for seawater nutrient salts provided in an embodiment of the present invention;
FIG. 2 is a schematic view of a colorimetric measurement sample cell;
FIG. 3 is a schematic view of the structure of the splice mounting plate;
FIG. 4 is a schematic structural view of an upper end cover of the third cabin;
FIG. 5 is a schematic structural view of a lower end cover of the third cabin;
in the figure: 1. a measurement control and photoelectric conversion module; 2. a sampling module; 3. an underwater in-situ filtration module; 4. a reagent and standard sample storage module; 5. a colorimetric measurement module; 6. installing a through plate on the joint; 7. a first cabin; 8. a second cabin; 9. a third cabin; 51. a colorimetric measurement sample cell; 61. mounting a screw hole; 62. the reagent and standard sample storage box is provided with a fixing hole; 91. a communication and power supply watertight cable joint; 91. a cable sealing joint group; 93. a power supply cable water tight joint group; 511. a liquid core waveguide; 512. an optical-to-liquid coupling joint; 5120. an optical output port; 5121. an optical input port; 5122. a liquid path input joint; 5123. liquid way output connects.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and detailed description.
Example (b):
referring to fig. 1 to 5, the in-situ seawater nutrient salt analysis apparatus provided in this embodiment includes a measurement control and photoelectric conversion module 1, a sample sampling module 2, a power supply module (not shown), an underwater in-situ filtration module 3, a reagent and standard sample storage module 4, and a colorimetric analysis and measurement module 5.
The power supply module is respectively electrically connected with the measurement control and photoelectric conversion module 1 and the sampling and selecting module 2 to provide electric quantity for the work of the measurement control and photoelectric conversion module 1 and the sampling and selecting module 2, specifically, the power supply module is mainly a magnetic control switch, the power supply process can be controlled in a non-contact way through an external magnet so as to be convenient for the adjustment and control of the power supply process, and the measurement control and photoelectric conversion module 1 mainly comprises a measurement control unit and a photoelectric conversion unit.
The underwater in-situ filtering module 3 is used for filtering collected seawater, is a micro multistage filtering device, is optimized on the basis of 'an underwater in-situ filtering device' disclosed in patent document CN102553325B in order to reduce the volume of an instrument, and mainly comprises an outer filtering net and an inner filtering core, in order to ensure the reliability of in-situ filtering, the outer filtering net is formed by sintering titanium powder or 316 stainless steel powder, has good rigidity and is pressure-resistant and non-deformable, the inner filtering core is formed by sintering rods with certain apertures, the sintering rods can be titanium powder, 316 stainless steel powder or copper powder, in addition, in order to increase the corrosion resistance of the filtering device, the sintering rods are copper sintering rods, and the apertures of the outer filtering net are larger than those of the inner filtering rod.
The sampling and selecting module 2 mainly comprises a high-precision plunger pump for sample pumping and mixing, an electromechanical driving device thereof, a full-automatic selection valve head for selecting samples and reagents, and an electromechanical driving device thereof, wherein the full-automatic selection valve head is externally provided with M (M is more than 1) liquid path joints, and the underwater in-situ filtering module 3 is communicated with one sampling joint in the M joints externally provided with the full-automatic selection valve head through a corrosion-resistant pipe fitting so as to realize sampling of filtered seawater; in addition, in order to adapt to different sea areas and different sample filtering requirements, more than N (N is more than or equal to 1) filtering modules 3 can be installed in a matched mode, and the operation of the sampling and selecting module 2 is mainly controlled by a control unit.
The reagent and standard sample storage module 4 is composed of a plurality of reagent boxes and standard sample boxes, in order to ensure long-term reliability of the reagent, the reagent and standard sample boxes are made of shading materials, liquid communication is carried out between a liquid outlet of the reagent box and a liquid path joint externally arranged on a valve head, in order to increase safety of an instrument and avoid leakage of the standard sample and the reagent in the reagent box, preferably, the liquid outlets of the reagent box and the standard sample box are connected with joints with a cut-off function, the joints with the cut-off function are of a male-female threading plate and sleeve buckle structure, a male end/female end of each joint is connected with a liquid outlet of the reagent box, a female-male joint threading plate at the other end of each joint is connected with a full-automatic selection valve head through a corrosion-resistant hose, sleeve buckles are cut off, the liquid path is cut off, the reagent box and the standard sample boxes are in a closed state, the sleeve buckles are. Furthermore, in order to improve the safety of the instrument in use and avoid misconnection, the reagent and the standard sample box are respectively designed in different colors. Meanwhile, in order to increase the safety and flexibility of the use of the reagent kit and the standard sample box, as shown in fig. 3, the lower ends of the reagent and the standard sample box are provided with a stop functional connector installation passing plate 6, and the stop functional connector installation screw hole 61, a reagent and standard sample storage box installation fixing hole 62, an automatic sample selection module fixing hole and a cable through hole are designed on the passing plate. One end of the plate-passing cutoff functional joint, which is connected with the automatic sampling module, is fixed on the plate-passing through a mounting screw hole 61.
The colorimetric analysis and measurement module 5 mainly comprises a colorimetric measurement sample pool 51, as shown in fig. 2, the colorimetric measurement sample pool 51 comprises a total reflection AF-2400 liquid core waveguide 511 and a "Z" -shaped optical-liquid coupling joint 512 assembled at two ends of the liquid core waveguide, the length of the liquid core waveguide 511 can be arbitrarily adjusted as required, and the diameter of the liquid core waveguide 511 is adjustable within the range of 1500 um; for convenience and safety, the optical-liquid coupling port 512 of the Z-shaped optical-liquid coupling joint is designed to be watertight in structure and suitable for in-situ measurement. In addition, in order to enlarge the application range of the colorimetric measurement sample cell, the flexibility of the application is increased; the photoelectric conversion unit is designed with two types: the first type, the photoelectric conversion unit is composed of an optical fiber output light source, a light source power supply control subunit and an optical fiber input type spectrum monitoring subunit; secondly, the photoelectric conversion unit consists of a light source power supply control subunit and an analog electric signal processing subunit; the optical output port 5120 of the optical-fluid coupling joint 512 is designed with two types: first, a photo detector is directly installed at the optical output port 5120, and photo-detecting is performed on the colorimetric photometric signal, and the photo-detected signal is electrically connected to the analog electrical signal processing subunit. Second, an optical fiber is inserted into the optical output port 5120, and the colorimetric photometric signal is connected to the optical fiber input type spectrum monitoring subunit in the measurement and photoelectric conversion unit through optical communication. Accordingly, the optical input port 5121 in the optical-fluid coupling joint 512 is designed with two types: first, a light source is directly installed on the light input port 5121, and the light source is electrically connected to a power supply control subunit corresponding to the measurement control and photoelectric conversion module. The second is that the optical input port 5121 is inserted with optical fiber in the optical-hydraulic coupling joint, the optical fiber output type light energy provided in the measurement control and photoelectric conversion module is led into the colorimetric measurement sample cell through the optical fiber, the liquid path input joint 5122 of the "Z" type optical-hydraulic coupling joint at the water inlet of the colorimetric measurement sample cell is in watertight connection with one channel of the M joints externally arranged on the full-automatic selection valve head through a corrosion-resistant pipeline, the liquid path output joint 5123 of the "Z" type optical-hydraulic coupling joint at the water outlet of the colorimetric measurement sample cell is in watertight connection with the waste liquid collection bag through a corrosion-resistant waste discharge pipeline, and the waste liquid collection bag is hung slightly higher than the upper part of the measurement through a waste liquid bag hook to ensure the smoothness of the exhaust and waste.
The underwater in-situ filtration module 3 and the plunger pump are arranged in a first cabin body 7, the colorimetric analysis and measurement module 5, the full-automatic selection valve head and the reagent and standard sample storage module 4 are arranged in a second cabin body 8, and the power supply module, the measurement control and photoelectric conversion module 1 are arranged in a third cabin body 9; the first cabin body 7, the second cabin body 8 and the third cabin body 9 are vertically arranged from low to high in sequence, the two adjacent cabin bodies are isolated and sealed from each other, and all liquid flow paths and joints are externally arranged outside the cabin bodies. That is to say, all electronic systems, optical systems and mechanical moving parts of the device are sealed in a sealed cabin body, all liquid flow paths and joints are externally arranged in a water body, so that the liquid flow paths are completely isolated from optical, mechanical and electrical parts, fatal damage to key parts such as optical, mechanical and electrical parts caused by instrument liquid pipeline leakage or joint damage faults is avoided, and meanwhile, the device is designed into a three-layer structure, so that the device can be conveniently installed, detached and safely and effectively work in situ on site.
In addition, in order to further improve the safety and the usability of the device, a communication and power supply watertight cable joint 91 for power supply and communication with an upper computer is arranged on the upper end cover of the third cabin; an optical fiber or signal cable sealing joint group 92 for transmitting photoelectric signals is installed in the lower end cover of the third cabin body, and a power supply cable water sealing joint group 93 of the sampling module is also installed in the lower end cover of the third cabin body.
The use method of the seawater nutrient salt in-situ measuring device comprises the following steps:
s1, clamping a stop function joint of liquid outlets of a kit and a standard box with a plate penetrating joint to ensure that reagent pure water and standard liquid are communicated with a full-automatic selection valve; meanwhile, the reagent box and the standard sample box are fixed through a reagent and standard sample storage box mounting fixing rod.
S2, connecting the waste liquid bag bottle with a liquid path joint of a Z-shaped light-liquid coupling joint at the water outlet of the colorimetric measurement sample pool in a watertight manner through a corrosion-resistant waste discharge pipeline, and suspending the waste liquid bag bottle at the upper end of an instrument;
s3, controlling the instrument to be powered on through a magnetic control switch, enabling the analyzer to enter a user instruction waiting state, receiving an operation instruction of the upper computer at the moment, and enabling a user to control automatic sample introduction and colorimetric analysis and cleaning of the device through a user interface of the upper computer according to needs; and if a specific instruction is not received or an automatic data acquisition instruction is received within a fixed time period, performing automatic nutrient salt sample injection analysis and in-situ information storage.
S4, after work is finished, the magnetic control switch controls the instrument to be powered off, if the instrument is not used for a long time, the reagent bag box and the standard sample box are taken out of the instrument, the waste liquid bag is taken down, the pipeline is cleaned and then is ventilated to be stored
Therefore, the seawater nutrient salt in-situ analysis device provided by the invention has the following technical advantages:
1. the seawater nutrient salt in-situ measuring device provided by the invention has the advantages that the optical, mechanical and hydraulic systems are clearly divided, the optical, electrical and mechanical rotating parts are completely sealed and assembled, the hydraulic parts are completely externally arranged in a water environment, even if liquid leakage is caused by pipeline breakage and interface looseness during accidents, the optical, mechanical and electrical parts on the instrument theme are still very safe, and the device is a great advantage and breakthrough for wet chemical analysis.
2. The invention has compact and flexible structural design and easy disassembly and assembly, the measurement process can be completed in situ fully automatically by combining with the physicochemical environment of the sample, and only the light source needs to be replaced; the method can be used for in-situ measurement of various heavy metals, nutrient salts and other environmental parameters, and has wide application market and good application prospect.
3. The sample cell adopted by the invention has high sensitivity, wide application range and small dosage of samples and reagents, is very suitable for underwater long-time sequence in-situ monitoring and early warning, and can realize high-sensitivity detection of chemical elements such as nutrient salt with extremely low concentration and wide dynamic range by adjusting the length of the sample cell.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.
Claims (10)
1. An in-situ analysis device for seawater nutritive salt is characterized by comprising a measurement control and photoelectric conversion module, a sample taking and selecting module, a power supply module, an underwater in-situ filtering module, a reagent and standard sample storage module and a colorimetric analysis and measurement module; wherein,
the power supply module is respectively and electrically connected with the measurement control and photoelectric conversion module and the sampling and selecting module so as to provide electric quantity for the work of the measurement control and photoelectric conversion module and the sampling and selecting module;
the measurement control and photoelectric conversion module comprises a measurement control unit and a photoelectric conversion unit;
the underwater in-situ filtering module is used for filtering the collected seawater;
the sampling and selecting module is communicated with the underwater in-situ filtering module through a liquid path and is used for sampling the filtered seawater; the sampling and selecting module is also in signal connection with the measurement control unit, and the measurement control unit controls the working of the sampling and selecting module;
the reagent and standard sample storage module consists of a plurality of reagent boxes and standard sample boxes, and the sample taking and selecting module is communicated with the reagent boxes and the standard sample boxes through liquid paths so as to transmit the reagent and the standard sample to the sample taking and selecting module;
the colorimetric analysis measuring module is communicated with the sample taking and selecting module through a liquid path and is used for measuring and analyzing the sample taken by the sample taking and selecting module; the photoelectric conversion unit is connected with the colorimetric analysis and measurement module to provide light quantity for the operation of the colorimetric analysis and measurement module;
the sample taking and selecting module comprises a plunger pump and a full-automatic selection valve head, the plunger pump is used for pumping the filtered seawater, reagents in the kit and the sample box and the sample to the full-automatic selection valve head, and a plurality of liquid path joints are arranged outside the full-automatic selection valve head;
the underwater in-situ filtering module and the plunger pump are arranged in a first cabin body, the colorimetric analysis and measurement module, the full-automatic selection valve head and the reagent and standard sample storage module are arranged in a second cabin body, and the power supply module, the measurement control module and the photoelectric conversion module are arranged in a third cabin body; the first cabin body, the second cabin body and the third cabin body are vertically arranged from low to high in sequence, the two adjacent cabin bodies are isolated and sealed from each other, and all the liquid flow paths and the joints are externally arranged outside the cabin bodies.
2. The seawater nutrient salt in-situ analysis device of claim 1, wherein a watertight cable joint for power supply and communication with an upper computer is installed on the upper end cover of the third chamber; an optical fiber or signal cable sealing joint group for transmitting photoelectric signals is installed in the lower end cover of the third cabin body, and a power supply cable sealing joint group of the sampling module is also installed in the lower end cover of the third cabin body.
3. The in-situ seawater nutrient salt analysis device as claimed in claim 2, wherein the liquid outlets of the kit and the standard box are connected with a liquid path joint externally arranged on the full-automatic valve selecting head through a male-female plate sleeve joint; the male/female end of the male/female threading plate sleeve buckle joint is connected with the liquid outlet of the reagent kit and the sample box, the female/male end of the male/female threading plate sleeve buckle joint is communicated with a liquid path joint with an external full-automatic selection valve head through a corrosion-resistant hose, the male/female threading plate sleeve buckle is disconnected, the liquid path is cut off, the reagent kit and the sample box are in a closed state, the male/female threading plate sleeve buckle is communicated, the liquid path is communicated, and reagents in the reagent kit are communicated with the full-automatic selection valve head; the kit and the standard sample box are both made of shading materials and have different surface colors.
4. The in-situ seawater nutrient salt analysis device as claimed in claim 3, wherein the lower ends of the reagent kit and the sample box are respectively provided with a connector mounting plate, and the connector mounting plate is provided with a male-female plate-penetrating sleeve buckle connector mounting screw hole, a mounting fixing rod, an automatic sampling and selecting module fixing hole and a cable through hole.
5. The in situ seawater nutrient salt analysis device of claim 1, wherein the colorimetric measurement module comprises a colorimetric measurement sample cell; the colorimetric measurement sample pool is composed of a liquid core waveguide tube and Z-shaped light-liquid coupling joints assembled at two ends of the liquid core waveguide tube, the length of the liquid core waveguide tube can be adjusted at will according to needs, and the diameter of the liquid core waveguide tube can be adjusted within the range of 1500 um; the light-liquid coupling port of the light-liquid coupling joint is designed in a watertight structure.
6. The in-situ seawater nutrient salt analysis device as claimed in claim 5, wherein the photoelectric conversion unit comprises an optical fiber, a light source power supply control subunit and an optical fiber input type spectrum monitoring subunit, wherein the optical fiber is inserted into the optical output port of the optical-liquid coupling joint, and the colorimetric photometric signal is inserted into the optical fiber input type spectrum monitoring subunit through optical communication; and an optical input port in the optical-liquid coupling joint is connected with an optical fiber in an inserting mode so as to guide optical energy output by the optical fiber into the colorimetric measurement sample pool through the optical fiber.
7. The in-situ seawater nutrient salt analysis device as claimed in claim 5, wherein the photoelectric conversion unit is composed of a light source power supply control subunit and an analog electric signal processing subunit; installing a photoelectric detector at the optical output port of the optical-liquid coupling joint, performing photoelectric detection on the colorimetric photometric signal, and connecting the photoelectric detection signal into the analog electric signal processing subunit through electric connection; and a light source is arranged at the light input port of the light-liquid coupling joint, and the light source is electrically connected with the light source power supply control subunit for power supply control.
8. The in-situ seawater nutrient salt analysis device as claimed in claim 1, wherein the power supply control module is a magnetic switch to control the power supply process in a non-contact manner by an external magnet.
9. The seawater nutrient salt in-situ analysis device of claim 1, wherein the underwater in-situ filtration module comprises an outer filter screen and an inner filter core, the outer filter screen is formed by sintering titanium powder or 316 stainless steel powder, the inner filter core is formed by a sintered rod with a pore diameter, and the pore diameter of the outer filter screen is larger than that of the sintered rod; the sintered rod is titanium powder or 16 stainless steel powder or copper powder.
10. The in-situ seawater nutrient salt analysis device as claimed in claim 5, wherein a fluid path input connector of the Z-shaped light-liquid coupling connector at the water inlet of the colorimetric measurement sample cell is in watertight connection with one channel of a plurality of connectors externally arranged on the full-automatic selection valve head through a corrosion-resistant pipeline, a fluid path output connector of the Z-shaped light-liquid coupling connector at the water outlet of the colorimetric measurement sample cell is in watertight connection with the waste liquid collection bag through a corrosion-resistant waste discharge pipeline, and the waste liquid collection bag is higher than the colorimetric analysis measurement module so as to realize smooth exhaust and waste discharge.
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| CN111610161A (en) * | 2020-04-29 | 2020-09-01 | 中国科学院南海海洋研究所 | Circulation system, seawater nutrient salt in-situ measurement device and measurement method |
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| CN116519610B (en) * | 2023-05-11 | 2023-11-03 | 原生代(青岛)科技有限公司 | Nutritive salt in-situ analysis device |
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