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近年来,火焰原子吸收光谱法已广泛应用于环境污染和环境监测分析中,但天然水中的重金属元素,由于其含量太低,必须经过富集才能测定。目前,常用的富集方法为有机溶剂萃取法和离子交换法。我们用401螯合树脂(50～100目)富集天然水中的痕量重金属元素。401是一种国产凝胶型螯合性氨羧基离子交换树脂。它是在苯乙烯与二乙烯基苯网状结构的共聚体上引进亚氨二乙酸基的高分子聚合物。其网状结构的骨架既不与酸、碱和一般溶剂反应,也不溶
In recent years, flame atomic absorption spectrometry has been widely used in environmental pollution and environmental monitoring and analysis, but heavy metals in natural water, due to its low content, must be determined by enrichment. At present, the common enrichment methods are organic solvent extraction and ion exchange. We use 401 chelating resin (50 ~ 100 mesh) to enrich the trace heavy metal elements in natural water. 401 is a domestic gel-type chelating ammonia-based carboxyl ion exchange resin. It is in the styrene and divinyl benzene network structure of the copolymer into the iminodiacetic acid-based polymer. Its network structure of the matrix neither with acid, alkali and general solvent reaction, but also insoluble