乳和乳制品中无机砷测定方法的探讨

目的 对原子荧光光谱法测定乳和乳制品中无机砷的方法中仪器的工作参数、还原剂浓度选择等条件进行了探讨。方法 通过一系列实验选出了测定最佳条件。结果 在选定的最佳仪器条件下检出限为0.22 ng/mL、回收率为98%~105%、相对标准偏差为1.38%。结论 本方法具有灵敏度高、重现性好、准确性高等特点, 适合用于分析乳和乳制品中无机砷的含量。

Discussion on the determination of inorganic arsenic in milk and dairy products

Objective Study on the instrument parameters in atomic fluorescence spectrometry determination of inorganic arsenic in milk and dairy products, the reducing agent concentration and current-carrying choice conditions. Methods Selected a series of experiments parameters to determine the optimum conditions. Results Thedetection limit of the selected instrument conditions was 0.22 ng/mL, the recovery rate was 98.0%~105%, the relative standard deviation was 1.38%. Conclusion This method has high sensitivity, good reproducibility, high accuracy, suitable for the analysis of inorganic arsenic content in the milk and dairy products.