[GFAAS determination of trace amount cadmium in chitosan by micro wave]

In this work, a method had been developed for determination of cadmium in chitosan by means of graphite furnace atomic absorption spectrometry with micro wave digestion, 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 micro wave with mixed acid of HF-HClO4 (1:2). Trace amount cadmium has been 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 analytics in the samples such as: suitable precision values (R. S. D--2.8%) and the recover rate by standard addition is 97.0%-106.3%. The method is simple, rapid and with accurate results.