CONTROLLED-POTENTIAL AND DERIVATIVE POLAROGRAPH
Controlled-potential polarography has been exploited in the versatile controlled-potential and derivative polarograph. An amplifier continuously forces the potential of the polarized electrodc with respect to the reference electrode to equal that of the linearly inereasing control potential independently or circuit and of cell resistances. Controlled-potential pularography is espeeially suitable for high resistance media or for high current polarography in aqueous media where polarograms on ordinary instruments suffer distortion. because of iR drop in the electrolyte. The polarograph can be used for the analysis of irreversible and reversible species at very low conccntrations. It is possible to record the instantaneous currents, the successive peak currents, the successive average currents, easr the time derivative of the polarographic wave as a function of the potential of the polarized electrode with respect to the solution. Regular and derivative polarograms are presented that illustrate the advantage of controlled-postential over conventional polarography. (auth)
- Research Organization:
- Oak Ridge National Lab., Tenn.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-13-019859
- OSTI ID:
- 4248755
- Journal Information:
- Analytical Chemistry (U.S.) Formerly Ind. Eng. Chem., Anal. Ed., Journal Name: Analytical Chemistry (U.S.) Formerly Ind. Eng. Chem., Anal. Ed. Vol. Vol: 31; ISSN ANCHA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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