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本文描述了一个加基体改良剂后直接测定尿中铍的石墨炉原子吸收光谱法。基体改良剂由硝酸镁、硝酸镧、硝酸和硫酸组成。方法的灵敏度、测定范围、回收率和变异系数分别为0.09～0.42μg/L、0～30μg/L、87.6～101％(2～20μg/L)和4.2～9.0％。灵敏度和测定范围与石墨管的性能有关。尿中共存的元素不干扰铍的测定。在班前收集工人尿样,尽早加入等体积的基体改良剂后保存。
This paper describes a graphite furnace atomic absorption spectrometry method for the direct determination of beryllium in urine after addition of a matrix modifier. Matrix modifier from magnesium nitrate, lanthanum nitrate, nitric acid and sulfuric acid composition. The sensitivity, determination range, recovery rate and coefficient of variation of the method were 0.09 ~ 0.42μg / L, 0 ~ 30μg / L, 87.6 ~ 101% (2 ~ 20μg / L) and 4.2 ~ 9.0% respectively. Sensitivity and measurement range and graphite tube performance. Coexisting elements in the urine do not interfere with the determination of beryllium. Workers in the urine samples collected as soon as possible, after adding an equal volume of matrix modifier preservation.