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Determination of traces of chlorine in tantalum metal by cathodic stripping voltammetry

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Summary

Fractional to a fewμg of chloride ion is electrodeposited on a silver microanode from a hydrofluoric-nitric acid solution containing 0.1 g of tantalum. The deposit is then cathodically removed in a potassium nitrate solution, a current-voltage curve being recorded. The advantages of this method are high sensitivity, excellent precision, and simplicity.

Zusammenfassung

Bruchteile weniger Mikrogramm Chloridionen werden aus einer Flußsäure-Salpetersäurelösung, die 0,1 g Tantal enthält, elektrolytisch an einer Silbermikroanode abgeschieden. Die abgeschiedene Menge wird dann kathodisch in eine Kaliumnitratlösung übergeführt, wobei eine Stromspannungskurve aufgezeichnet wird. Der Vorteil dieser Vorgangsweise ist ihre hohe Empfindlichkeit, ihre hervorragende Genauigkeit und Einfachheit.

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Miwa, T., Mizuike, A. Determination of traces of chlorine in tantalum metal by cathodic stripping voltammetry. Microchim Acta 58, 452–456 (1970). https://doi.org/10.1007/BF01224144

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  • DOI: https://doi.org/10.1007/BF01224144

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