| 岩石中痕量铅的催化极谱测定—乙醇-碘化钾-钒(Ⅳ)-抗坏血酸-盐酸体系 |
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| 引用本文： | 俞德先.岩石中痕量铅的催化极谱测定—乙醇-碘化钾-钒(Ⅳ)-抗坏血酸-盐酸体系[J].岩石矿物学杂志,1984,3(2):165-168. |
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| 作者姓名： | 俞德先 |
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| 作者单位： | 冶金部中南冶金勘探地质研究所 |
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| 摘 要： | 本文根据前人的经验研究了乙醇—碘化钾—钒(Ⅳ)—抗坏血酸中铅的极谱催化波特性,乙醇的存在,使底液的背景电流大大降低,而ppb级铅仍有明晰的波形。铅的检出限达0.0005微克/毫升(2.5 ×10~(-9)M),催化电流与铅浓度在0～2微克/毫升较宽的范围内成直线关系。本文试验了各种
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Determination of Lead at ppb Levers by a Catalytic Polarographic Method |
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| Abstract: | In the presence of ethyl alcohol, there exists a sensitive polarographic ca-
talytic wave of the complex formed by Pb-Kl- V (IV)-ascorbic acid. The wave
is available for the determination of lead within the range of 1-2ug/ml. The
detection limit of lead is 0.0005ug/ml, the wave peak appears at -0.30v in
003M hydrochoric acid medium. |
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