2012•Chinese Journal of Health Laboratory TechnologyRequires access
Determination of lead and cadmium in the liver and seafood by microwave digestion-graphite furnace atomic absorption spectrometry
Zhang Da-fen
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Abstract
Objective:To establish a method for the determination of lead and cadmium in pork liver,kelp and layer.Methods:Food samples were treated with microwave digestion at first.Then with ammonium nitrate and ammonium hydrogen phosphate as matrix modifier,metal elements in food samples were determined by ZEEnit700p.Results:Based on study on optimum condition for determination of different metals,the results showed the method had good linearity and repeatability,the correlation coefficients of lead and cadmium were both greater than 0.999,detection limits were 0.5 μg/L for lead and 0.05 μg/L for cadmium,the recoveries of lead and cadmium were 87%～103% and 89%～94% respectively.Conclusion:This method was high sensitive,time-saving,less polluting and reliable.