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Improvement of polarographic precision by a comparative technique

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Summary

Comparative techniques are described which give an increase in precision of 100-fold over conventional polarography. By interchanging cells during measurement, certain electrode and cell inequalities are minimized. Major constituents of many matrices may be determined onμg amounts of sample with a precision as good as 2 parts in 10000. The technique is illustrated by the determination of copper, cadmium, and zinc in several materials.

Zusammenfassung

Vergleichsmethoden wurden beschrieben, mit deren Hilfe eine l00fache Steigerung der Genauigkeit der konventionellen Polarographie zu erreichen ist. Durch Wechsel der Zellen während der Messung lassen sich gewisse Einflüsse von Ungleichheiten der Zelle und der Elektrode auf ein Minimum herabsetzen. In Mikrogrammengen vieler Mehrstoffsysteme lassen sich Hauptbestandteile mit einer Genauigkeit von 2 Teilen/10000 bestimmen. Die Bestimmung von Cu, Cd und Zn in verschiedenen Proben wird beschrieben.

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References

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Maienthal, E.J., Taylor, J.K. Improvement of polarographic precision by a comparative technique. Mikrochim Acta 55, 939–945 (1967). https://doi.org/10.1007/BF01216840

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  • DOI: https://doi.org/10.1007/BF01216840

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