| 铌与溴邻苯三酚红和丁基罗丹明B协同显色及其应用 |
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| 引用本文： | 陶慧林,张玉荣.铌与溴邻苯三酚红和丁基罗丹明B协同显色及其应用[J].岩矿测试,1999,18(3):211-214. |
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| 作者姓名： | 陶慧林 张玉荣 |
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| 作者单位： | 桂林工学院材料工程系,桂林,541004 |
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| 摘 要： | 研究了在溴化十六烷基吡啶存在下，铌与溴邻苯三酚红及丁基罗明Ｂ的协同显色反应。在优化条件下，体系所形成的多元配合物最大吸收波长位于６３５ｎｍ处，表观摩尔吸光系数为１．４３＊１０＾５Ｌ．ｍｏｌ＾－１．ｃｍ＾－１，铌的质量浓度在０－１．００ｍｇ／Ｌ符合比尔定律。考察了３０多种共存离子的影响。结果表明干扰较少，钽的允许量可以达到铌的２０倍。方法用于水系沉积，煤渣，合金钢中铌的测定，结果与标准值相符。加标回
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| 关 键 词： | 铌 溴邻苯三酚红 丁基罗丹明B 协同显色 比色法 |
| 修稿时间： | 1998-12-21 |
Synergistic Chromogenic Reaction of Niobium with Bromopyrogallol Red and Butyl Rhodamine B and Its Application |
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| TAO Hui-lin,ZHANG Yu-rong.Synergistic Chromogenic Reaction of Niobium with Bromopyrogallol Red and Butyl Rhodamine B and Its Application[J].Rock and Mineral Analysis,1999,18(3):211-214. |
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| Authors: | TAO Hui-lin ZHANG Yu-rong |
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| Abstract: | Synergistic chromogenic reaction of niobium with bromopyrogallol red and butyl rhodamine B in the presence of hexadecylpyridinium bromide was studied. In the optimized conditions, a multicomponent ionassociated complex was formed. The maximum absorption was at 635 nm with molar absorptivity of 1.43105 Lmol-1cm-1. Beer's law was obeyed in the concentration range of 01.00 mg/L for Nb. More than 30 coexistent elements were examined and no serious interference was observed. The tolerance for Ta concentration was as higher as 20 times to that of Nb. The method has been applied to the spectrophotometric determination of Nb in sediments, coal cinder and alloy steels. The results were in agreement with standard values. Recovery of the standard addition for Nb was 965% with precision of 1.8%2.1% RSD (n=6).\=\= |
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| Keywords: | niobium bromopyrogallol red butyl rhodamine B hexadecylpyridinium bromide synergistic chromogenic reaction spectrophotometry |
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