2015•Packaging and Food MachineryRequires access
Determination of Lead and Cadmium in Longting Plums by Microwave Digestion-graphite Furnace Atomic Absorption Spectrometry
Cao Fen
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Abstract
A method was developed for determination of lead and cadmium in Longting plumsby microwave digestion-GFAAS,the sample was digested with HNO3- H2O2,and the contents were determined by calibration curve method. It was showed that the linear range of lead andcadmium at 0. 0 ~ 5. 0 ng / m L and 0. 0 ~2. 5 ng / m L,the correlation coefficients were 0. 99969 and0. 99989. The average recovery of lead was 98. 2%,and the average recovery of cadmium was 97. 9%. RSD( n = 6) of lead and cadmium were 2. 03% and2. 18%. The detection limits of lead and cadmium were 0. 002 mg / kg and 0. 0003 mg / kg. The result showed that this method was simple and fast,andcould determine the content of lead and cadmium exactly in Longting plums.