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火焰原子吸收法测定钢铁中铅，采用0．2％十二烷基硫酸钠（SDS）和0．001mol／L硝酸介质，加入硫脲消除共存元素铋的干扰，铅的浓度在0—20μg／mL范围内服从比耳定律。方法检出限为0．10μg／mL，相对标准偏差为2．30％，回收率为97％—99％，样品测定结果令人满意。并对阴离子表面活性剂增感机理进行了探讨。
Determination of lead in steel by flame atomic absorption spectrometry (FAAS), using 0.2% sodium dodecyl sulfate (SDS) and 0.001 mol / L nitric acid medium, adding thiourea to eliminate the interference of coexisting element bismuth, the concentration of lead is 0-20μg / mL obey Beer’s law. The detection limit of the method was 0.10μg / mL, the relative standard deviation was 2.30% and the recovery rate was 97% -99%. The determination results of the sample were satisfactory. The sensitization mechanism of anionic surfactant was also discussed.