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《Journal of South China Normal University(Natural Science Edition)》 2006-01
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DETERMINATION OF TRACE ELEMENTS IN GRAIN BY NONCOMPLETE DIGESTION-FLAME ATOMIC ABSORPTION SPECTROMETRY

LIU Li-xing,QI Na (School of Petrochemical Technology,Liaoning University of Petroleum & Chemical Technology,Fushun.113001,China)  
The samples were treated with noncomplete digestion method,i.e.the grain samples were digested in the mixed acid of HClO_4-HNO_3(1:3) under low temperature,and then the undigested fat was dissolved in emulsifier OP,and so made into transparent grass-green solution of sample.A FAAS method for rapid determination of trace elements in grain has been developed.The test indicated that the viscosity of test solution was identical with its blank solution and there was not background absorption interference.The pretreatment conditions of sample,chemical interference,the detection limit and characteristic concentration were studied.RSD's were less than 3.7%.The determination results were consistent with those obtained by ashing method.The relative errors were less than ±3.9%.This method was convenient.
【CateGory Index】: O657.31;TS210.7
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