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本文报导了阳极溶出伏安法测定化妆品粉中的铅。探计了处理粉样的最佳条件。样品先经硝酸-高氯酸混合液消化,然后在醋酸-醋酸钠介质中(pH=5.6)测得铅溶出峰。峰高与1×10~(-9)～9×10~(-7)摩尔/升范围内的铅浓度之间有良好的线性关系。应用本方法在SV-1溶出伏安仪上测定了若干种化妆品粉中的铅含量。方法的精密度与准确度均符合微量分析的要求。
This paper reports the determination of lead in cosmetic powders by anodic stripping voltammetry. Probed the best conditions for processing powder samples. Samples were first nitric acid - perchloric acid mixture digestion, and then in acetic acid - sodium acetate medium (pH = 5.6) measured the peak of lead dissolution. There is a good linear relationship between peak height and lead concentration in the range of 1 × 10 -9 to 9 × 10 -7 mol / l. The method was used to determine the lead content of several cosmetic powders on the SV-1 stripping voltammetry. The accuracy and accuracy of the method are in line with the requirements of trace analysis.