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本文利用自己研制的巯基甲壳素对Ｐｂ~（２＋）和Ｃｄ~（２＋）具有良好的吸附效果这一特性，建立了巯基甲壳素分离富集－火焰原子吸收法测定天然水体中的Ｐｂ~（２＋）和Ｃｄ~（２＋）的新方法。并对吸附条件进行了研究。此方法对Ｐｂ~（２＋）和Ｃｄ~（２＋）的最低测定下限可达到 １．０μｇ／Ｌ和 ０． ０５μｇ／Ｌ．此时的回收率分别达到 ９５．６％和 ９６．８％。此方法灵敏度高，选择性好，用于实际水样的测定并取得满意的结果。
In this paper, we have established a method for the determination of Pb ~ (Ⅱ) in natural water by flame atomic absorption spectrometry (FAAS) with its own mercapto-chitin adsorption characteristics of Pb 2+ and Cd 2+. 2+) and Cd ~ (2+). Adsorption conditions were studied. The lowest limit of determination of Pb 2+ and Cd 2+ can reach 1.0 μg / L and 0. 05μg / L. At this point the recovery rate reached 95.6% and 96.8% respectively. This method has high sensitivity and good selectivity, which is applied to the determination of actual water samples with satisfactory results.