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TitleApplication of a field portable anodic stripping voltammeter to the analysis of sulphide-selective leaches and waters
AuthorHall, G E M; Vaive, J E
SourceChemical Geology vol. 97, 1992 p. 295-306,
Alt SeriesGeological Survey of Canada, Contribution Series 47090
PublisherElsevier BV
Mediapaper; on-line; digital
File formatpdf
Subjectsgeneral geology; analytical methods; zinc; copper; sulphides
AbstractA field portable anodic stripping voltammeter, the PDV-2000®, is evaluated for application to the analysis of the sulphide-selective leach, KClO3-HCl and waters. The accuracy and precision obtained in the determination of Zn, Cd, Pb and Cu are assessed by application to international standard reference samples and by concurrent atomic absorption spectrometric analysis. Accuracy for Zn in the presence of potential interferences, Cu and Ni, is ensured by the addition of 500 mg 1-1 Ga and calibration by standard additions; in this manner, concentrations up to 20-fold excess of Cu and 30-fold excess of Ni are tolerated. Using a 60-s plating period, the detection limits in a 10-ml solution are ~ 0.8 µg 1-1 for Zn and Cu, and ~ 0.2 µg 1-1 for Cd and Pb. Relative standard deviation at the 10 µg 1-1 level is typically ±4% for Zn and Cu and ±2% for Cd and Pb.

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