示差脉冲极谱法测定海水中痕量锗
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摘要: 海水中Ge(Ⅳ)含量很低,一般为ng/dm3数量级[1-3]。目前用于海水中Ge(Ⅳ)的分析方法不多。早年有人用共沉淀富集-苯基芴酮盐光度法,近年则采用氢化物发生石墨炉原子吸收法[1]。80年代以来,我国一些研究者陆续利用Ge(Ⅳ)与某些多元酚(如邻苯三酚,邻苯二酚等)的络合物在V(Ⅳ)等氧化剂存在下产生的灵敏吸附催化波,进行矿石,合金等样品中微量锗的测定[4,5]。但至今尚未见应用电分析法于海水中锗的分析。本文拟提出一个灵敏的示差脉冲极谱法,以测定海水中痕量Ge(Ⅳ),并避免通常多次分离手续[6,7]。
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