Determination of bismuth by electrochemical stripping analysis; elimination of interferences by using a mercury film electrode modified with tri-n-octylphosphine oxide, and application to copper alloys.
A mercury film electrode modified with a film consisting of tri-n-octylphosphinc oxide in a poly(vinyl chloride) matrix is used for a galvanostatic stripping determination of bismuth in copper and copper alloys. The method can be used to determine from 0.002 to 0.5% of bismuth. It is very selective, simple and rapid. The precision and accuracy are good and the only serious interference is caused by tin(IV).
Lexa
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Chemical Laboratories, Central Research Institute, Skoda Works. 316 00 Pilsen, Czechoslovakia.
Stulík
K
K