本文采用2,3-二羟基萘作为三价铁的络合剂,KBrO3作为催化剂,在采样过程中加入2,2'-联吡啶掩蔽活性二价铁,用催化吸附阴极溶出法对烟台近岸海水中总活性铁、活性三价铁、活性二价铁、溶解态总铁以及有机络合态铁等5种形态铁的含量进行了分析测定,建立了一套适用于分析近岸海水中5种不同形态铁的方法.该方法测定的最低检出限为0.84 nmol· L-1,灵敏度根据所加入铁浓度不同分别为125、3.95、1.25 nA·L·nmol-1.此外,应用文中方法对标准海水样品CASS-5和NASS-6中的铁含量进行测试,测试结果与标准海水中铁的浓度基本符合.
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