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- W2363662294 abstract "The method for the determination of copper,lead,cadmium and chromium in asparagus by microwave digestion and graphite furnace atomic absorption spectrophotometry(GFAAS) was obtained.The effects of microwave digestion system and conditions on digestion results were studied.The system of HNO3-H2O2-H2O and the way of gradient pressurization were chosen to get a better digestion result.The effects of NH4H2PO4 mass concentration,ashing temperature and atomizing temperature on absorbency were studied.The optimal determination conditions were found by single factor experiments.Under the optimal conditions,the contents of copper,lead,cadmium and chromium in asparagus were 15.2,5.64,0.314 and 1.72 μg/g respectively;the precision relative standard deviations were 3.81%,2.80%,2.35% and 2.92% respectively.The detection limits were 3.37,2.91,0.21 and 0.76 ng/mL,and the recoveries in asparagus were 92.5%,106.0%,102.5% and 97.0% respectively.This method is rapid and accurate with less pollution and a high practical value." @default.
- W2363662294 created "2016-06-24" @default.
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- W2363662294 date "2013-01-01" @default.
- W2363662294 modified "2023-09-23" @default.
- W2363662294 title "Determination of Copper,Lead,Cadmium and Chromium in Asparagus by Microwave Digestion-GFAAS" @default.
- W2363662294 hasPublicationYear "2013" @default.
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