MICROWAVE DIGESTION OF BIOLOGICAL SAMPLES WITH ACID MIXTURE IN A CLOSED DOUBLE PTFE VESSEL FOR METAL DETERMINATION BY ONE-DROP FLAME ATOMIC-ABSORPTION SPECTROMETRY

被引:24
作者
KOJIMA, I
KATO, A
IIDA, C
机构
[1] Laboratory of Analytical Chemistry, Nagoya Institute of Technology, Showa-ku, Nagoya, 466, Gokiso-cho
关键词
ATOMIC ABSORPTION SPECTROMETRY; BIOLOGICAL SAMPLES; MICROWAVE DIGESTION; TRACE METALS;
D O I
10.1016/0003-2670(92)85302-M
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A microwave-heat system using a closed double PTFE vessel with a polypropylene jacket was evaluated for rapid sample preparation for the determination of trace elements in biological samples. The microwave-assisted digestion was based on sample dissolution with a HNO3-HClO4-HCl-HF mixture. The simultaneous digestion of six samples including one blank was completed within 15 min even with very mild heating. The presence of an alkaline solution between the PTFE vessels was very effective in aiding the digestion and absorption of evolved acid gases. Six metals (Ca, Cu, Fe, Mg, Mn and Zn) in standard reference materials, NIST-SRM 1577 Bovine Liver, NIES-CRM No. 1 Pepperbush, No. 6 Mussel, No. 5 Human Hair, No. 7 Tea Leaves and No. 9 Sargasso, were analysed by "one-drop" flame atomic absorption spectrometry. Good agreement of the analytical results with the certified values was obtained.
引用
收藏
页码:101 / 106
页数:6
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