MICROWAVE DIGESTION FOR THE DETERMINATION OF ARSENIC, CADMIUM AND LEAD IN SEAFOOD PRODUCTS BY INDUCTIVELY-COUPLED PLASMA-ATOMIC EMISSION AND MASS-SPECTROMETRY

A single microwave digestion procedure was developed for use with a va riety of seafood products. Inductively coupled plasma atomic emission and mass spectrometry were used to determine the levels of As, Cd and Pb in samples of tuna, salmon, shrimp, walleye, clams, oysters and lob ster. The precision for ten replicate analyses of clams was 2.1% for A s at the 10.0 mu g g(-1) level, 5.6% for Pb at the 0.067 mu g g(-1) le vel and 2.5% for Cd at the 0.079 mu g g(-1) level. Acceptable spike re coveries in each of the sample types were achieved using both detectio n methods. Results for two standard reference materials were in good a greement with certified values