Stripping Voltammetry with a Flow-through Electrochemical Cell for Simultaneous Trace Determination of Nickel(II) and Copper(II) in Concentrated Alkaline Solutions
A highly sensitive method for the on-line simultaneous determination of trace CuII and NiII in high-purity alkaline solutions has been demonstrated by anodic stripping voltammetry (ASV) using a radial flow cell Au electrode (RFCE-Au). In this method, the electrolysis process is performed while alkal...
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Published in | BUNSEKI KAGAKU Vol. 60; no. 8; pp. 665 - 670 |
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Main Authors | , , , |
Format | Journal Article |
Language | Japanese |
Published |
The Japan Society for Analytical Chemistry
2011
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Subjects | |
Online Access | Get full text |
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Summary: | A highly sensitive method for the on-line simultaneous determination of trace CuII and NiII in high-purity alkaline solutions has been demonstrated by anodic stripping voltammetry (ASV) using a radial flow cell Au electrode (RFCE-Au). In this method, the electrolysis process is performed while alkaline solutions flow through RFCE-Au without any pretreatment. Under the optimum conditions, linear calibration graphs for CuII and NiII were obtained in the range of 0.5-6.0 μg dm−3 in KOH solution and 0.5-5.0 μg dm−3 in NaOH solution, respectively. The detection limits of CuII and NiII, defined as 3 σ of the 0.5 μg dm−3 signal, were 0.047 μg dm−3 and 0.13 μg dm−3 in KOH solution, and 0.058 μg dm−3 and 0.15 μg dm−3 in NaOH solution, respectively. The proposed method is applicable to on-line trace analysis of CuII and NiII, which has been urgently needed in the semiconductor manufacturing process. |
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ISSN: | 0525-1931 |
DOI: | 10.2116/bunsekikagaku.60.665 |