DETERMINATION OF METAL ELEMENTS IN SOYBEAN PRODUCTS BY MICROWAVE DIGESTION-MPT-AES(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Title:: DETERMINATION OF METAL ELEMENTS IN SOYBEAN PRODUCTS BY MICROWAVE DIGESTION-MPT-AES

Author(s):: LI Li-hua; ZHANG Li-jing; ZHANG Jin-sheng; GAO Hui; LI Xiu-ping; Institute of Petroleum & Chemical Technology,Liaoning University of Petroleum & Chemical Technology,Fushun 113001

Keywords:: Microwave Plasma Torch-atomic emission spectrometry (MPT-AES); Microwave digestion; Soybean products

Abstract:: The method of determining metal elements in beans by microwave digestion-Microwave Plasma Torch-atomic emission spectrometry (MPT-AES) was studied. Through experimental data,the influence of analytical line,microwave forward power,the flow rate of carrier gas and support gas,oxygen shield pressure to emission strength of metal elements of Copper,Iron,Nickel,Cadmium were chosen and optimized. The effects of acid concentration and coexistent ions on determination of metal ions were analyzed,and the experimental conditions were optimized. Under the optimum conditions,the detection limit (separately are 8.28,18.96，2.77 and 3.19 ng mL^-1),RSD (separately are 1.46%,3.65%,2.30%,1.62%) and the recovery (98.97％～101.29％) of Copper,Iron,Nickel and Cadmium were obtained,and the accuracy of method was identified by the standard addition recovery.

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Last Update: 2014-10-21