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Polarography of Ammonium 1-Pyrrolidinecarbodithioate and Ammonium 2-Carboxy-1-pyrrolidinecarbodithioate at the Dropping Mercury Electrode

1973; Oxford University Press; Volume: 46; Issue: 7 Linguagem: Inglês

10.1246/bcsj.46.2151

1348-0634

Toyokichi Kitagawa, Koji Taku,

Analytical Chemistry and Sensors

Direct current and alternating current polarographic behaviors of ammonium 1-pyrrolidinecarbodithioate (APCD) and ammonium 2-carboxy-1-pyrrolidinecarbodithioate (ACPCD) were investigated at the dropping mercury electrode. APCD showed an adsorption pre-wave (−0.70 V vs. SCE) and one-electron oxidation wave (−0.42 V). ACPCD showed only an adsorption wave (−0.65 V). These results were also confirmed by the investigation of the electrocapillary curves and the current-time curves. The surface excess of APCD or ACPCD on the surface of mercury drop electrode at the potential which the adsorption process was observed were 5.76×10−10 mol/cm2 and 2.62×10−10 mol/cm2, respectively.