GFAAS AND AFS DETERMINATION OF TRACES OF METALS IN VEGETABLES WITH MICROWAVE HEATING SAMPLE DIGESTION

Microwave assisted heating was applied to the digestion of vegetable samples,and contents of Pb、 Cd、 As and Hg in the sample were determined by GFAAS and AFS.Working parameters of the instruments,including the microwave oven,the atomic absorption spectrometer and the atomic fluorescence spectrometer,were studied and optimized.Some notes on the proper application of the method were also given.In the application of the proposed method to the analysis of 2 SRM samples of wild cabbage and poplar leaves,results obtained were in consistency with the certified values.