[GFAAS determination of trace amount cadmium in shark liver after microwave digestion]

In the present work, a method was developed for the determination of cadmium in shark liver by means of graphite furnace atomic absorption spectrometry with microwave digestion, and a systematic study was carried out by selection of the most appropriate working conditions and optimization of the sample mass. The samples were digested by microwave with mixed acid of HF-HCIO4 (1:2). Trace amount cadmium was determined by graphite furnace atomic absorption spectrometry (GFAAS) with Pd(NO3)2 as a matrix modifier. If appropriate working conditions are chosen, the method finally proposed shows interesting features for the determination of the analyte in the samples such as: suitable precision values. To assure the analytical quality, porcine liver GBW 08551 was used as a standard reference material. The measured values were in a good agreement with the certified ones within the analytical error of +/-10%. The method is simple and rapid with accurate results.