CN114487027A - A method for determining total solids in cereal thick pulp by electrical conductivity - Google Patents
A method for determining total solids in cereal thick pulp by electrical conductivity Download PDFInfo
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- CN114487027A CN114487027A CN202111613660.3A CN202111613660A CN114487027A CN 114487027 A CN114487027 A CN 114487027A CN 202111613660 A CN202111613660 A CN 202111613660A CN 114487027 A CN114487027 A CN 114487027A
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- 239000007787 solid Substances 0.000 title claims abstract description 75
- 235000013339 cereals Nutrition 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000010790 dilution Methods 0.000 claims abstract description 44
- 239000012895 dilution Substances 0.000 claims abstract description 44
- 239000000243 solution Substances 0.000 claims abstract description 36
- 239000002002 slurry Substances 0.000 claims abstract description 32
- 239000012488 sample solution Substances 0.000 claims abstract description 12
- 238000007865 diluting Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000005259 measurement Methods 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 6
- 238000012417 linear regression Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 abstract description 15
- 238000001035 drying Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000012141 concentrate Substances 0.000 description 4
- 239000000523 sample Substances 0.000 description 4
- 235000013361 beverage Nutrition 0.000 description 3
- 238000001599 direct drying Methods 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 2
- 238000010561 standard procedure Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000003556 assay Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005303 weighing Methods 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
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/06—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid
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- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
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- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention discloses a method for determining the concentration of total solid shape objects in grain thick slurry through conductivity, which comprises the following steps: performing gradient dilution on the grain concentrated slurry with known initial total solid concentration, measuring the conductivity of the solution after each dilution at a preset temperature, and calculating the total solid concentration in the corresponding diluted solution; fitting a relation formula of the concentration of the total solid matters and the conductivity by taking the concentration of the total solid matters and the corresponding conductivity as references; diluting the concentrated cereal pulp to be detected to obtain a sample solution to be detected; measuring the conductivity of the sample solution to be measured at the preset temperature; and substituting the conductivity of the sample solution to be detected into the relational formula to obtain the concentration of the total solid matters in the grain thick slurry to be detected. Compared with a standard drying detection method, the method has the advantages of low cost, simplicity in operation and rapidness in detection, and can timely and effectively guide production on line.
Description
Technical Field
The invention relates to the technical field of food manufacturing, in particular to a method for measuring total solid shape substances in grain thick slurry through electric conductivity.
Background
With the improvement of national living standard and the enhancement of health consciousness and environmental protection consciousness, the demand of people on cereal beverages is gradually increased, and particularly the demand of oat pulp beverages shows a well-eruption trend in recent years.
The total solids content is an important quality indicator in cereal based beverages. The standard determination method of the total solid is a direct drying method, the accuracy of the determination method is higher, but the determination method comprises the steps of sample evaporation, repeated container drying, constant weight and the like, the detection efficiency is low (the detection is generally completed within 3 to 4 hours), and the online guidance of the production cannot be timely and effectively realized.
Disclosure of Invention
The invention provides a method for measuring total solid shape objects in grain thick slurry through conductivity, which adopts the detailed technical scheme as follows:
a method for determining total solids concentration in a cereal mash by conductivity, comprising:
performing gradient dilution on the grain concentrated slurry with known initial total solid concentration, measuring the conductivity of the solution after each dilution at a preset temperature, and calculating the total solid concentration in the corresponding diluted solution;
fitting a relation formula of the concentration of the total solid matters and the conductivity by taking the concentration of the total solid matters and the corresponding conductivity as references;
diluting the concentrated cereal pulp to be detected to obtain a sample solution to be detected;
measuring the conductivity of the sample solution to be measured at the preset temperature;
and substituting the conductivity of the sample solution to be detected into the relational formula to obtain the concentration of the total solid matters in the grain thick slurry to be detected.
In some embodiments, the fitting a concentration versus conductivity equation for total solids includes: and fitting a relation formula of the concentration of the total solid matters and the conductivity by adopting a linear regression model.
In some embodiments, the concentration of total solids versus conductivity is formulated as: y ═ 0.0605X-0.0005; wherein: y is the concentration of the total solids and X is the conductivity.
In some embodiments, the performing a gradient dilution of a cereal concentrate of known total solids concentration comprises: dissolving the grain concentrated slurry with the known total solid concentration in a first weight into pure water in a second weight, and uniformly stirring to finish primary dilution; adding pure water of a third weight, and uniformly stirring to finish the ith dilution, wherein i is a natural number more than or equal to 2.
In some embodiments, the total solid concentration in the solution after the i-th dilution is calculated as follows: the total solid concentration in the solution after the ith dilution is equal to the weight of the thick slurry after the ith dilution/the total weight of the solution after the ith dilution x 20 × the initial total solid concentration, wherein: the weight of the thick slurry after the ith dilution is equal to the total weight of the solution after the i-1 th conductivity measurement/the total weight of the solution after the i-1 th dilution multiplied by the weight of the thick slurry after the i-1 th dilution; total weight of solution after the i-th dilution is total weight of solution after the i-1 th conductivity measurement + third weight.
In some embodiments, the diluting the grain thick stock to be tested comprises: and (3) dissolving the first weight of the concentrated cereal pulp to be detected in the second weight of pure water, and uniformly stirring.
In some embodiments, the first total amount is 2g, the second weight is 38g, and the third weight is 3 g.
In some embodiments, the predetermined temperature is 26.3 ℃.
The detection time of the total solid shape object determination method provided by the invention is shortened to 3-5 minutes, and the detection accuracy is close to that of a standard method. Compared with a standard drying detection method, the method has the advantages of low cost, simplicity in operation and rapidness in detection, and can timely and effectively guide production on line.
Drawings
FIG. 1 is a graph of conductivity versus total solid form concentration fitted by a linear regression model.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below, so as to clearly and clearly define the scope of the present invention.
The standard determination method of the total solid is a direct drying method, the accuracy of the determination method is high, but the determination method comprises the steps of evaporating a sample to dryness, repeatedly drying a container, keeping constant weight and the like, the detection efficiency is low (the detection is generally completed for 3-4 hours), and the online guidance on the production cannot be timely and effectively realized.
In view of the above, the invention provides a method for determining the concentration of total solid shape substances in grain thick slurry through conductivity, compared with a standard drying detection method, the method has the advantages of low cost, simple operation and rapid detection, and can timely and effectively guide production on line.
The invention provides a method for determining the concentration of total solid shape objects in grain thick slurry through conductivity, which comprises the following steps:
a cereal concentrate having a known initial total solids concentration is diluted in a gradient, the conductivity of the solution after each dilution is measured at a predetermined temperature, and the total solids concentration in the corresponding diluted solution is calculated.
And fitting a relation formula of the concentration of the total solid matters and the conductivity by taking the concentration of the total solid matters and the corresponding conductivity as a reference.
Diluting the concentrated cereal pulp to be detected to obtain a sample solution to be detected.
The conductivity of the sample solution to be measured is measured at a predetermined temperature.
And substituting the conductivity of the sample solution to be detected into a relational formula to obtain the concentration of the total solid matters in the grain thick slurry to be detected.
The following will describe in further detail the steps of carrying out the assay method of the present invention, taking oat concentrate as an example.
The initial total solids concentration of the standard oat concentrate was known to be 27.12%.
Gradient dilution strategy: diluting for the first time, taking 2g of standard oat thick pulp, and dissolving in 38g of pure water. After each subsequent dilution, 3g of purified water was added. A total of 13 dilutions were made.
After each dilution, the temperature of the solution was adjusted to 26.3 ℃ and the conductivity of the solution was measured using a conductivity measuring device. The solution is then weighed (actual weighing of the solution is required because of some loss of solution during conductivity measurement), and the concentration of total solids in the solution is calculated based on this.
Wherein: the concentration of total solids in the solution after the first dilution was taken directly as the initial total solids concentration of 27.12%. The concentration of the total solid in the solution after each subsequent dilution is calculated according to the following formula:
the total solid concentration in the solution after the ith dilution is equal to the weight of the thick slurry after the ith dilution/the total weight of the solution after the ith dilution x 20 × the initial total solid concentration, wherein:
the weight of the thick slurry after the ith dilution is equal to the total weight of the solution after the i-1 th conductivity measurement/the total weight of the solution after the i-1 th dilution multiplied by the weight of the thick slurry after the i-1 th dilution;
the total weight of the solution after the ith dilution is equal to the total weight of the solution after the ith-1 conductivity measurement plus a third weight; wherein i is a natural number of 2 to 13,
after dilution in a gradient and recording the relevant value for each dilution, the data shown in the following table were obtained:
then, a relation formula of the concentration of the total solid matter and the conductivity is fitted by taking the concentration of the total solid matter and the conductivity in the table as a reference.
Specifically, a linear regression model is adopted to fit a relational formula, fig. 1 is a relational curve of the conductivity and the total solid concentration fitted by the linear regression model, and the relational formula obtained by fitting is as follows:
y ═ 0.0605X-0.0005; wherein: y is total solid concentration and X is conductivity.
And (3) testing and verifying:
extracting 8 oat thick pulp samples, wherein each oat thick pulp sample is from a different batch of oat thick pulp-like product, each sample weighs 2g, and the extraction method comprises the following steps:
first, it was dissolved in 38g of water.
Then, the total solid concentration is measured by adopting a standard direct drying method; the total solid concentration is calculated by measuring the conductivity and then substituting the conductivity into the above relational equation.
Finally, the difference in total solids concentration obtained from the two test methods was compared.
The data obtained are shown in the following table:
therefore, the detection accuracy of the total solid shape object determination method provided by the invention is close to that of the detection of a standard method.
In addition, the detection time of the method for determining the total solid shape object only needs 3 to 5 minutes, which is far lower than that of the conventional drying method for 3 to 4 hours.
The invention has been described above with a certain degree of particularity. It will be understood by those of ordinary skill in the art that the description of the embodiments is merely exemplary and that all changes that come within the true spirit and scope of the invention are desired to be protected. The scope of the invention is defined by the appended claims rather than by the foregoing description of the embodiments.
Claims (8)
1. A method for determining total solids concentration in a cereal mash by conductivity, comprising:
performing gradient dilution on the grain concentrated slurry with known initial total solid concentration, measuring the conductivity of the solution after each dilution at a preset temperature, and calculating the total solid concentration in the corresponding diluted solution;
fitting a relation formula of the concentration of the total solid matters and the conductivity by taking the concentration of the total solid matters and the corresponding conductivity as references;
diluting the concentrated cereal pulp to be detected to obtain a sample solution to be detected;
measuring the conductivity of the sample solution to be measured at the preset temperature;
and substituting the conductivity of the sample solution to be detected into the relational formula to obtain the concentration of the total solid matters in the grain thick slurry to be detected.
2. The method for determining total solids in a cereal slurry by conductivity as in claim 1, wherein fitting the equation for total solids concentration versus conductivity comprises:
and fitting a relation formula of the concentration of the total solid matters and the conductivity by adopting a linear regression model.
3. The method for determining total solids in a cereal slurry by conductivity as in claim 1, wherein the concentration of total solids is related to conductivity by the formula:
Y＝0.0605X-0.0005；
wherein: y is the concentration of the total solids and X is the conductivity.
4. The method for determining total solids in a cereal slurry by conductivity as in claim 1, wherein said subjecting a cereal slurry of known total solids concentration to a gradient dilution comprises:
dissolving the grain concentrated slurry with the known total solid concentration in a first weight into pure water in a second weight, and uniformly stirring to finish primary dilution;
adding pure water of a third weight, and uniformly stirring to finish the ith dilution, wherein i is a natural number more than or equal to 2.
5. The method for determining total solids in a cereal slurry by conductivity as in claim 4 wherein the total solids concentration in the solution after the i-th dilution is calculated as follows:
the total solid concentration in the solution after the ith dilution is equal to the weight of the thick slurry after the ith dilution/the total weight of the solution after the ith dilution x 20 × the initial total solid concentration, wherein:
the weight of the thick slurry after the ith dilution is equal to the total weight of the solution after the i-1 th conductivity measurement/the total weight of the solution after the i-1 th dilution multiplied by the weight of the thick slurry after the i-1 th dilution;
the total weight of the solution after the i th dilution is the total weight of the solution after the i-1 st conductivity measurement plus a third weight.
6. The method for determining total solids in a grain slurry by conductivity as claimed in claim 4 wherein diluting the grain slurry to be tested comprises:
and (3) dissolving the first weight of the concentrated cereal pulp to be detected in the second weight of pure water, and uniformly stirring.
7. The method for determining total solids in a cereal mash by conductivity as claimed in claim 4, wherein said first total amount is 2g, said second weight is 38g and said third weight is 3 g.
8. The method for determining total solids in a cereal slurry by conductivity as in claim 1, wherein the predetermined temperature is 26.3 ℃.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60259941A (en) * | 1984-06-06 | 1985-12-23 | Mitsubishi Heavy Ind Ltd | Measurement for concentration of suspension |
| JPH08297108A (en) * | 1995-04-27 | 1996-11-12 | Sumitomo Chem Co Ltd | Measuring method of slurry concentration |
| CN102854228A (en) * | 2012-09-04 | 2013-01-02 | 西北农林科技大学 | Edible oil peroxidation value determination method based on conductivity |
| JP2014002069A (en) * | 2012-06-19 | 2014-01-09 | Horiba Advanced Techno Co Ltd | Device for measuring activated carbon concentration related parameter |
| CN107561128A (en) * | 2017-08-18 | 2018-01-09 | 武汉轻工大学 | The method of salt content and application in a kind of quick measure dry fruit beetle and/or halogen soup |
| CN108982596A (en) * | 2018-09-26 | 2018-12-11 | 新疆烯金石墨烯科技有限公司 | A kind of measuring method and device of graphene oxide solution concentration |
-
2021
- 2021-12-27 CN CN202111613660.3A patent/CN114487027A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60259941A (en) * | 1984-06-06 | 1985-12-23 | Mitsubishi Heavy Ind Ltd | Measurement for concentration of suspension |
| JPH08297108A (en) * | 1995-04-27 | 1996-11-12 | Sumitomo Chem Co Ltd | Measuring method of slurry concentration |
| JP2014002069A (en) * | 2012-06-19 | 2014-01-09 | Horiba Advanced Techno Co Ltd | Device for measuring activated carbon concentration related parameter |
| CN102854228A (en) * | 2012-09-04 | 2013-01-02 | 西北农林科技大学 | Edible oil peroxidation value determination method based on conductivity |
| CN107561128A (en) * | 2017-08-18 | 2018-01-09 | 武汉轻工大学 | The method of salt content and application in a kind of quick measure dry fruit beetle and/or halogen soup |
| CN108982596A (en) * | 2018-09-26 | 2018-12-11 | 新疆烯金石墨烯科技有限公司 | A kind of measuring method and device of graphene oxide solution concentration |
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