GB640768A - Improvements in or relating to polaro graphs - Google Patents

Improvements in or relating to polaro graphs

Info

Publication number
GB640768A
GB640768A GB2144848A GB2144848A GB640768A GB 640768 A GB640768 A GB 640768A GB 2144848 A GB2144848 A GB 2144848A GB 2144848 A GB2144848 A GB 2144848A GB 640768 A GB640768 A GB 640768A
Authority
GB
United Kingdom
Prior art keywords
current
phase
interrupter
residual
curve
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
Application number
GB2144848A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cambridge Instruments Ltd
Original Assignee
Cambridge Instruments Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Cambridge Instruments Ltd filed Critical Cambridge Instruments Ltd
Priority to GB2144848A priority Critical patent/GB640768A/en
Publication of GB640768A publication Critical patent/GB640768A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/416—Systems
    • G01N27/48—Systems using polarography, i.e. measuring changes in current under a slowly-varying voltage

Abstract

640,768. Determining physical quantities of materials. CAMBRIDGE INSTRUMENT CO., Ltd., and JESSOP, G. Aug. 13, 1948, No. 21448. [Class 37] Apparatus for the polarographic analysis of solutions in which a constant, small A.C. voltage is superposed on the normal D.C. voltage, thus producing a current consisting of the normal D.C. current giving a curve comprising a series of sloping steps, and an A.C. current whose magnitude is substantially constant except for sharp peaks corresponding to the middle of the steps in the D.C. curve is characterized in the use of phase-sensitive means for determining the magnitude of the peak A.C. current over the residual A.C. The current from a polarographic cell B supplied with D.C. from source A and A.C. from source D is fed through an A.C. amplifier E to an interrupter F operating at the same frequency as the A.C., whose phase is controlled by an impedance network H and is adjusted to be substantially in phase with the A.C. supply, whereby the residual A.C. which is out-ofphase with the applied volts is eliminated from the readings of a meter G, and only the inphase current is measured. The interrupter F may be replaced by other means for phase selection and rectification.
GB2144848A 1948-08-13 1948-08-13 Improvements in or relating to polaro graphs Expired GB640768A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2144848A GB640768A (en) 1948-08-13 1948-08-13 Improvements in or relating to polaro graphs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2144848A GB640768A (en) 1948-08-13 1948-08-13 Improvements in or relating to polaro graphs

Publications (1)

Publication Number Publication Date
GB640768A true GB640768A (en) 1950-07-26

Family

ID=10163116

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2144848A Expired GB640768A (en) 1948-08-13 1948-08-13 Improvements in or relating to polaro graphs

Country Status (1)

Country Link
GB (1) GB640768A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2941142A (en) * 1955-04-19 1960-06-14 Niki Eiji Derivative polarograph by the alternating current bridge method
US3065410A (en) * 1959-07-10 1962-11-20 Atomic Energy Authority Uk Cathode ray polarograph

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2941142A (en) * 1955-04-19 1960-06-14 Niki Eiji Derivative polarograph by the alternating current bridge method
US3065410A (en) * 1959-07-10 1962-11-20 Atomic Energy Authority Uk Cathode ray polarograph

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