【摘要】 通过化学加入法校正吸收效应,采用X射线荧光分析法(XRF)分析人发样品,确定人发中微量元素的含量。以实际人发样品为基础,求得经基体吸收后的相对效率,拟合出相对效率与基体中重要成分Ca含量的关系式,然后用标定的系数进行人发样品中的Ca、Cu、Fe、Zn含量分析。采用此方法分析了一组人发标准物质,并与国标推荐值进行比较,结果表明测定值与推荐值符合情况良好,与国标相比偏差为Ca0.28%,Fe0.99%,Cu2.6%,Zn0;相对测量误差Ca2.2%,Fe1.7%,Cu2.2%,Zn1.1%,其灵敏度≤2.2%。表明采用XRF分析人发中微量元素含量是可行的。更多还原

【Abstract】 Using chemical addition method to calibrate absorption effect, trace element in human hair are analyzed with X-ray fluorescence (XRF). Based on practical samples of human hair, the relative matrix absorption efficienty is determined, and the relation ship between which and the most important componet Ca is fitted. The contents of Ca, Cu, Fe, Zn in the human hair are analyzed using the calibrated constants. A group of standard human hair samples are analyzed and the results are compared with the recommended value of the National Standard. The measured values show a good coincidence with the recommended values. Comparing to the GB, the deviations are Ca 0.28%, Fe 0.99%, Cu 2.6%, Zn 0; the relative errors are Ca 2.2%, Fe 1.7%, Cu 2.2%, Zn (1.1%,) and the sensitivity is ≤2.2%. This method may be used to determine the tracing elements in human hair.更多还原