Potentiometric stripping determination of heavy metals using a graphite-reinforcement carbon vibrating electrode |
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| Authors: | T Kakizaki and Kiyoshi Hasebe |
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| Institution: | (1) Department of Chemistry, Hokkaido University of Education at Iwamizawa, Iwamizawa 068, Japan, JP;(2) Graduate School of Environmental Earth Science, Hokkaido University, Sapporo 060, Japan, JP |
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| Abstract: | Potentiometric stripping determination of Cd, Cu and Zn using a vibrating electrode (VE) is presented. A simple VE was constructed
by using a piezoelectric bimorph oscillator and an inexpensive graphite-reinforcement carbon (GRC) rod (a mechanical pencil).
Experimental results obtained with the simple VE follow the equation valid for quantitative application of potentiometric
stripping analysis (PSA) in large solutions. It was found that the GRC vibrating electrode is suitable for multielement trace
analysis of small samples of 0.05 mL. The relative standard deviations for divalent metals are better than 2%.
Received: 3 February 1997 / Revised: 2 June 1997 / Accepted: 7 June 1997 |
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