10年人发，指、趾甲镉含量的光谱法测定

在近10年内按季度收集了同一个体人发样品33份，指甲样品41份和趾甲样品39份。应用火焰原子吸收光谱法测定了人发、指甲、趾甲中镉的含量。绘制了含量值随时间(年)的变化曲线。获得了镉含量的波动范围：人发0.010 0～0.410 0 μg*g－1，指甲0.029 5～0.531 4 μg*g－1，趾甲0.089 9～1.274 μg*g－1。变化曲线均具有非线性特征。

Determination of Trace Cadmium in Human Hair,Fingernail and Toenail for Ten Years by Flame Atomic Absorption Spectrometry

The human hair, fingernail and toenail were collected from one person quarterly for about ten years, respectively thirty-three, forty-one and thirty-nine shares. The contents of traces cadmium in hair, fingernail and toenail have been determined by flame atomic absorption spectrometry, and the results were satisfactory. From a changing curve in human hair, fingernail and toenail cadmium by age, we found that the range of cadmium contents in hair was 0.0100-0.4100 microgram.g-1, in fingernail 0.0295-0.5314 microgram.g-1, in tene-nail 0.0899-1.274 micrograms.g-1, respectively. In the changing curve there is a nonlinear characteristic.