HG-AFS Determination of Zinc in Sea Shellfishes with Microwave Assisted Sample Digestion

Microamounts of zinc in four kinds of sea shellfishes were determined by hydride generation atomic fluorescence spectrometry.The sample was digested with HNO3 and H2O2.Under the optimized conditions,linear realationship between the values of fluorescence intensity and mass concentration of Zn2+ ion was obtained in the range within 600 μg·L-1,with detection limit (3s/k) of 0.66 μg·L-1.The proposed method was applied to the determination of micro amounts of zinc in 4 samples of shellfishes.Using these samples as matrixes,tests for recovery were made by standard addition method and values of recovery found were in the range of 92.2%-101.9%.