全血中铟测定的石墨炉原子吸收光谱法

Determination of indium in whole blood by graphite furnace atomic absorption spectrometry

目的通过考察不同化学改进剂对石墨炉原子吸收光谱仪测定全血中铟的增感效应，建立测定全血中铟的新方法。方法以0.3％HNO3（体积分数）＋0．1％Triton X-100（体积分数）混合液为稀释液、含1000μg／ml Pd（NO3）2＋3000μg／ml Mg（NO3）2溶液为化学改进剂，对血液进行5倍稀释后，直接用石墨炉原子吸收分光光度法测定铟的含量。结果该方法最低检出限为0．33μg/L，线性范围0．33～100．00μg／L，相对标准偏差1．43％～2．65％，回收率98．3％～105．3％。结论该方法具有简便、快速、回收率高、精密度好的优点，适用于全血中铟含量的测定。

Objective To investigate the sensitization effect of different chemical modifiers in the determination of indium in whole blood by graphite furnace atomic absorption spectrometry, and to develop a new method for the determination of indium in whole blood. Methods A mixture of 0.3% HNO3 （ V/V ） ＋ 0. 1% Triton X-100 （V/V） was used as a diluent, and a solution of 1 000 μg/ml Pd（ NO3）2 ＋ 3 000 μg/ml Mg（ NO3 ） 2 was used as modifier. After being diluted five times, the concentration of indium of the blood was directly determined by graphite furnace atomic absorption spectrometry. Results The detection limit of the method was 0.33 μg/L, the linear range was 0.33～100.00 μg/L, the relative standard deviation was 1.43%～2.65%, and the recovery rate was 98.3%～105.3%. Conclusion The method is simple and fast and has high recovery and precision, and it is suitable for the determination of indium in whole blood.