【摘要】 本文介绍一种在刻度试管中用钢铁试剂—甲基异丁基酮螯合萃取体系富集Cu、Fe后于两相中连续测定Zn、Cu、Fe的原子吸收光谱法。用于人发测定时,Cu、Fe的灵敏度可提高近20倍,Zn、Cu、Fe的变异系数分别为0.6,2.5,6.5％,回收率范围是98～106％。本法用样量少(0.1g),操作简便。更多还原

【Abstract】 Copper and iron, chelated by cupferron and extracted by methyl-iso-butyl-ketone at pH 3.4-4.2, are enriched and the absorption signals of AAS are enhanced by the organic solvent, thus result in a smaller sample requirement (less than 100 mg hair) and a higher sensitivity (almost 20 times the original aqueous solution). The recoveries of zinc, copper and iron for human hair analysis are in the range of 98-106%, and the coefficients of variation are 0.6, 2.5 and 6.5% respectively. The recommended method is simple, easy to manipulate and suitable to medical application.更多还原