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Study on the Color Reaction of 4,6 - Dichloro - 2 - ( 2 - Tetrahydrogen imidazole) - Amino Pyrimiidine(DTIAP) with Copper( Ⅱ)
Author(s): 
Pages: 23-25
Year: Issue:  1
Journal: PETROCHEMICAL INDUSTRY APPLICATION

Keyword:  DTIAP分光光度法;
Abstract: 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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