| 试剂4,6-二氯-2-(2-咪唑四氢)-氨基嘧啶与铜(Ⅱ)的显色反应的研究 |
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| 引用本文： | 丁润梅,胡奇林,周惠良. 试剂4,6-二氯-2-(2-咪唑四氢)-氨基嘧啶与铜(Ⅱ)的显色反应的研究[J]. 石油化工应用, 2007, 26(1): 23-25 |
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| 作者姓名： | 丁润梅 胡奇林 周惠良 |
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| 作者单位： | 宁夏大学化学化工学院,宁夏,银川,750021;宁夏医学院,宁夏,银川,750004 |
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| 摘 要： | 研究了试剂4,6-二氯-2-(2-咪唑四氢)-氨基嘧啶(DTIAP)与铜的显色反应,建立了光度法测定微量铜的新方法。试验结果表明:在乳化剂十六烷基三甲基溴化铵(CTMAB)存在下,在Na2HPO4-KH2PO4缓冲溶液中,Cu2+与DTIAP发生灵敏的显色反应,形成了一种稳定的摩尔比1:2的黄色配合物,其最大吸收波长为383nm,Cu2+量在0-0．9mg／L范围内符合比尔定律,表观摩尔吸光系数ε=2．03×104L．mol-1．cm-1,相关系数r=0．9991。将该方法用于茶叶,香米中微量铜的测定,均获得满意的结果。
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| 关 键 词： | DTIAP 铜 分光光度法 |
| 文章编号： | 1673-5285(2007)01-0023-03 |
| 修稿时间： | 2006-12-11 |
Study on the Color Reaction of 4,6 - Dichloro - 2 - ( 2 - Tetrahydrogen imidazole) - Amino Pyrimiidine(DTIAP) with Copper( Ⅱ) |
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| DING Runmei,HU Qilin,ZHOU Huiliang. Study on the Color Reaction of 4,6 - Dichloro - 2 - ( 2 - Tetrahydrogen imidazole) - Amino Pyrimiidine(DTIAP) with Copper( Ⅱ)[J]. Petrochemical Industry Application, 2007, 26(1): 23-25 |
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| Authors: | DING Runmei HU Qilin ZHOU Huiliang |
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| Abstract: | The new reagent 4,6- dichloro - 2 - (2 - tetrahydrogen imidazole) - amino pyrimidin (DTIAP) gives yellow coloured water solution with copper(Ⅱ)in Na2HPO4 - KH2PO4 buffer medium . A new more simple spectrophotometric method to determine trace copper has been developed. The Cu(Ⅱ) - DTIAP complex shows an absorbance maximum at 383 nm. A calibration graph has been obtained from 0 to 0. 9mg/L. The molar absorptivity is 2. 03×104L. mol-1.cm-1.This colour reaction has high sensitivity and satisfactory selectivity. Most of the common coexisting metal ions do not interfere with the color reaction. Therefore , this method has been advantageously used for the determination of copper(Ⅱ) in rice and tea samples. |
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| Keywords: | DTIAP |
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