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Differential-pulse anodic-stripping voltammetric determination of traces of lead in high-purity copper after its separation by ion exchange

✍ Scribed by S.R Kayasth; A.K Basu; N Chattopadhyay; H.B Desal

Publisher: Elsevier Science
Year: 1990
Tongue: English
Weight: 286 KB
Volume: 231
Category: Article
ISSN: 0003-2670
DOI: 10.1016/s0003-2670(00)86408-9

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✦ Synopsis

Trace amounts

of lead m copper can be determmed by dtfferenttal-pulse anodtc-stnppmg voltammetry after separatmg rt from the matnx Lead was quantrtatrvely retamed on a small Dowex l-X4 ton-exchange column, wtthout retammg copper when present as a copper-amme complex m soluttons contammg 0.2 M sodtum hydroxrde. Subsequent desorptton was done wtth 2 M mtnc actd After deposttton for 1 mm on a hangmg mercury drop electrode and-subsequent stnppmg, the timtt of detection was 2 ng mi-" and' the timtt of quantttication was 6.6-ng mi-"

Recovenes of lead were checked by standard addttton to copper solutton.

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