Microwave Digestion of Vegetables and Determination of Cadmium by Graphite Furnace Atomic Absorption Spectrometry

Vegetables was digested in a microwave digestion system and based on the self-absorption background correct method. NH4H2PO4-Mg(NO3)2 was used as matrix modifier in the direct GFAAS determination of trace amounts of cadmium in vegetables . Optimum conditions for the determination were studied thoroughly. The linear range is 0-6μg/L with detection limit of 0. 16μg/L. The recoveries are 96. 4%-103. 8%. The method was applied in the determination of trace amounts of cadmium in Vegetables sample with satisfactory results.