DETERMINATION OF CD, CU, AND PB IN ANIMAL-TISSUES - COMPARISON OF ELECTROCHEMICAL RESULTS OBTAINED WITH A NEW POLAROGRAPHIC SYSTEM AND ATOMIC SPECTROSCOPY

Reference materials of animal origin have been analyzed for Cd, Cu, an d Pb contents by voltammetry using ECO-TRIBO Polarograph with pen-type renewed Hg electrode after dry ashing in superoxidizing atmosphere (m ixture of O-2 + O-3 + NOX). The contents of all metals mentioned were independently determined in aliquots of identical digests by atomic ab sorption spectrometry (AAS). Statistical evaluation showed good correl ation between both methods. Moreover, the electrochemical results obta ined for biological certified reference material (CRM) 12-02-01 Bovine Liver are in very good agreement with certified values for Cd and Pb.