期刊名称：Revista Internacional de Contaminación Ambiental
印刷版ISSN：0188-4999
出版年度：1996
卷号：12
期号：1
页码：41-44
语种：Spanish
出版社：Centro de Ciencias de la Atmósfera
摘要：The use of a microwave digestion system was evaluated as a mean of reducing sample preparation time for the later determination of metals such as Cd, Pb, Cu in beef liver by atomic absorption spectrometry. The procedure involved the digestion of 1.25 g of liver with 5 ml of HNO 3 50% v/v and 30 % 3 ml de H 2 O 2 30% v/v at 90 psi, 85-100 % of the power range, with 55 min of digestion time. Standard addition recoveries expressed in percentages were 100 % both for Cd and Pb and 100.5 % for Cu with a variability coeficient of 3.89 %. The results obtained for metals in beef liver were in agreement with the values published by USDA. The digestion method provides accurate and precise results in less time than conventional digestion procedures, without volatile elements loss.
其他摘要：The use of a microwave digestion system was evaluated as a mean of reducing sample preparation timefor the later determination of metals such as Cd, Pb, Cu in beef liver by atomic absorption spectrometry.The procedure involved the digestion of 1.25 g of liver with 5 ml of HNO3 50% v/v and 30 %3 ml de H2O2 30% v/v at 90 psi, 85-100 % of the power range, with 55 min of digestion time. Standard addition recoveriesexpressed in percentages were 100 % both for Cd and Pb and 100.5 % for Cu with a variability coeficientof 3.89 %. The results obtained for metals in beef liver were in agreement with the values published byUSDA. The digestion method provides accurate and precise results in less time than conventional digestionprocedures, without volatile elements loss.
关键词：digestión por microondas; hígado de bovino; metales pesados
