直接测定尿中铅的石墨炉原子吸收光谱法

目的]改进尿中铅的石墨炉原子吸收光谱法。方法]尿样加基体改进剂后，通过优化仪器实验条件，直接进样测定尿中铅。结果]尿铅浓度在0～120μg／L范围内呈良好的线性关系，相关系数r=0．9996，最低检出限为0．016μg／L，相对标准偏差小于3．08％，回收率为97．6％～103．2％。结论]该方法简便、快速、灵敏度高、精密度好、结果准确，适用于直接测定尿中铅。

Direct Determination of Lead in Urine by Graphite Furnace Atomic Absorption Spectrometry

Objective]To improve determination of lead in urine by graphite furnace atomic absorption spectrometry. Methods]Urine baseplates modifier, the experimental conditions by optimizing the device directly into the urine samples of lead. Results]Urinary lead concentration in the 0-120μg/L within the linear relationship, the correlation coefficient r = 0. 999 6 ,the lowest detection limit of 0. 016μg/L,relative standard deviation of less than 3.08% ,recoveries of 97.6% and 103.2 %. Conclusion]The method is simple, rapid, high sensitive, precise, accurate and suitable for direct determination of lead in urine.