GB939686A - Improvements in or relating to gas chromatograph apparatus - Google Patents
Improvements in or relating to gas chromatograph apparatusInfo
- Publication number
- GB939686A GB939686A GB3026959A GB3026959A GB939686A GB 939686 A GB939686 A GB 939686A GB 3026959 A GB3026959 A GB 3026959A GB 3026959 A GB3026959 A GB 3026959A GB 939686 A GB939686 A GB 939686A
- Authority
- GB
- United Kingdom
- Prior art keywords
- capacitor
- detector
- contacts
- sept
- switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06G—ANALOGUE COMPUTERS
- G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
- G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
- G06G7/18—Arrangements for performing computing operations, e.g. operational amplifiers for integration or differentiation; for forming integrals
- G06G7/184—Arrangements for performing computing operations, e.g. operational amplifiers for integration or differentiation; for forming integrals using capacitive elements
- G06G7/186—Arrangements for performing computing operations, e.g. operational amplifiers for integration or differentiation; for forming integrals using capacitive elements using an operational amplifier comprising a capacitor or a resistor in the feedback loop
- G06G7/1865—Arrangements for performing computing operations, e.g. operational amplifiers for integration or differentiation; for forming integrals using capacitive elements using an operational amplifier comprising a capacitor or a resistor in the feedback loop with initial condition setting
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/86—Signal analysis
- G01N30/8603—Signal analysis with integration or differentiation
- G01N30/8606—Integration
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Mathematical Physics (AREA)
- Biochemistry (AREA)
- Mathematical Optimization (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Pure & Applied Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Health & Medical Sciences (AREA)
- Power Engineering (AREA)
- Mathematical Analysis (AREA)
- Software Systems (AREA)
- Computer Hardware Design (AREA)
- Algebra (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Amplifiers (AREA)
Abstract
939,686. Determining relative quantities of fluid mixture constituents. W. G. PYE & CO. Ltd. Sept. 1, 1960 [Sept. 4, 1959], No. 30269/59. Class 37. In a gas chromatograph apparatus incorporating a capacitor C and a balanced amplifier A connected together as a feedback integrator whereby signals I+I emanating from the chromatograph detector are integrated, a current is provided at terminal Z for backing-off the standing current produced in the detector. The single capacitor may be replaced by a number of capacitors of different values which may selectively be placed in circuit by a simple switching arrangement. A switch may be provided to give a direct reading of the detector output, the switch substituting a resistor for the capacitor. The capacitor can be short circuited for resetting purposes by manual switching, clock operated contacts or contacts on the indicator. The effect of such contacts is described with reference to Figs. 3-6 (not shown). A suitable balanced amplifier which reduces zero drift is described with reference to Fig. 7, the point X being maintained at nearly constant potential regardless of the output level by feeding the output signal to the dummy half.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3026959A GB939686A (en) | 1959-09-04 | 1959-09-04 | Improvements in or relating to gas chromatograph apparatus |
| DE1960P0025634 DE1129322B (en) | 1959-09-04 | 1960-09-05 | System for integrating electrical output voltages from the detector of a gas chromatograph |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3026959A GB939686A (en) | 1959-09-04 | 1959-09-04 | Improvements in or relating to gas chromatograph apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB939686A true GB939686A (en) | 1963-10-16 |
Family
ID=10304968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3026959A Expired GB939686A (en) | 1959-09-04 | 1959-09-04 | Improvements in or relating to gas chromatograph apparatus |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1129322B (en) |
| GB (1) | GB939686A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3375701A (en) * | 1964-12-24 | 1968-04-02 | Chemcell 1963 Ltd | Methods and apparatus for interpreting overlapping signals |
| FR2173133A1 (en) * | 1972-02-23 | 1973-10-05 | Euratom | |
| US8398728B2 (en) | 2007-11-13 | 2013-03-19 | E I Du Pont De Nemours And Company | Process for making a composition comprising at least two different dialkyl ethers |
-
1959
- 1959-09-04 GB GB3026959A patent/GB939686A/en not_active Expired
-
1960
- 1960-09-05 DE DE1960P0025634 patent/DE1129322B/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3375701A (en) * | 1964-12-24 | 1968-04-02 | Chemcell 1963 Ltd | Methods and apparatus for interpreting overlapping signals |
| FR2173133A1 (en) * | 1972-02-23 | 1973-10-05 | Euratom | |
| US8398728B2 (en) | 2007-11-13 | 2013-03-19 | E I Du Pont De Nemours And Company | Process for making a composition comprising at least two different dialkyl ethers |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1129322B (en) | 1962-05-10 |
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