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本文用塞曼效应无焰原子吸收法测定饮用水中的痕量铝。研究了多种基体改进剂对Al信号的影响,找出最佳改进剂Ca-抗坏血酸。研究并给出了最佳灰化、最佳原子化和抑制干扰等的条件。本方法具有操作简单、快速、灵敏度高、共存元素干扰较少等优点。方法的检测限为0.001mg/L,线性范围0~0.05mg/L,回收率97.2~102.5%,十次测定相对标准偏差为4.7%,可以直接用于测定饮用水中的痕量铝。
In this paper, the trace amount of aluminum in drinking water is determined by Zeeman effect flameless atomic absorption spectrometry. The effects of various matrix modifiers on Al signal were studied, and the best modifier Ca-ascorbic acid was found. Research and give the best conditions of ashing, the best atomization and interference suppression. The method has the advantages of simple operation, rapidity, high sensitivity and less interference of coexisting elements. The detection limit of the method was 0.001mg / L, the linear range was 0 ~ 0.05mg / L, the recovery rate was 97.2 ~ 102.5%. The relative standard deviation of the ten determinations was 4.7%, which could be directly used for determination of drinking Trace amount of aluminum in water.