RAPID DETERMINATION OF IRON,MANGANESE AND ZINC IN MELON SEEDS BY FLAME ATOMIC ABSORPTION SPECTROMETRY WITH NONCOMPLETE DIGESTION METHOD
LIU Li-xing,LIU Yun-peng (Department of Applied Chemistry,Liaoning University of Petroleum and Chemical Technology,Fushun 113001,China)
The melon seeds sample was digested in mixed acid of HClO_4-HNO_3 (1+3) under low temperature.The fat produced during the digestion process was dissolved by adding emulsifier OP and giving a homogeneous and transparant solution of sample.A noncomplete digestion-flame atomic absorption spectromery for rapid determination of iron,manganse and zinc in melon seeds have been developed.Effects of mixed acid of HClO_4-HNO_3(1+3) and medium,the pretreatment condition of sample and detection limit were studied. The coexistence elements in the sample have no chemical interference on manganse, viscosity of test solution is identical with its blank solution. The relative standard deviations(n=6) were less than 3.8%.The recoveries were 98.4%-102.0%.
【CateGory Index】： O657.3