WET DIGESTION USING MICROWAVE IRRADIATION FOR MINERALIZATION OF ORGANIC-SAMPLES BEFORE HEAVY-METAL DETERMINATION BY DIFFERENTIAL-PULSE ANODIC-STRIPPING VOLTAMMETRY .2. FOOD AND ANIMAL TISSUE

Investigations on low pressure mineralization in the microwave system are presented. Animal tissue, flour, milk powder and infant feeding fo rmula were mineralized using a mixture of nitric and perchloric acids under previously established optimal power and duration of microwave i rradiation. Zn, Cd, Pb and Cu were determined in mineralized materials by differential pulse anodic stripping voltammetry. The reliability o f the applied procedure was tested by analysing international standard reference materials.