Interference in anodic stripping voltammetry from the Teflon vessels used in pressurized digestion.
The insufficient inertness of Teflon vessels towards acids at high temperature and pressure is shown to be the source of some interferences in anodic stripping voltammetry. To avoid such problems the use of Pyrex glass inserts in Teflon-lined steel bombs is proposed for the determination of non-volatile heavy metals. The procedure is easily applied to commercially available digestion bombs. Blank values and recovery tests for blood samples spiked with Cd, Pb and Cu are given, and the completeness of the digestion has been checked.
Oehme
M
M
Department of Chemistry, University of Oslo, Box 1033, Blindern, Oslo 3, Norway.