摘要
研究了新合成的１－（２－羟基－３，５－二硝基苯基）－３－「４－（苯基偶氮）苯基」、三氮烯（ＨＤＮＰＡＰＴ）试剂，在乳化剂ＯＰ存在下与镉的显色反应。在ＰＨＯ １０．３０￣１０．８０的Ｎａ２Ｂ４Ｏ７－ＮａＯＨ介质中，镉与ＨＤＮＰＡＰＴ形成１：１的红色配合物，表观摩尔吸光系数ε５３０＝１．８５×１０＾３Ｌ／（ｍｏｌ·ｃｍ），镉浓度在０￣０．６ｍｇ／Ｌ范围内符合比尔定律。
The color reaction of the mew reagent 1-(2-hydroxy-3,5-dinitrophenyl)-3-(4-phenylazophenyl)-triazene (HDNPAPT) with cadmium has been studied.Results showed that the color reagent reacted with Cd(Ⅱ) to form a stable red complex (1:1) in the presence of emulsifier OP and Na,B4O7-NaOH(pH 10.30-10.80).The absorption maximum of apparent molar absorptivity at 530 nm is 1.85×105 ly(mol·cm).Beer's law is obeyed for cadmium(Ⅱ) in the range 0 ~ 0.6 mg/L.The method can be used in the direct determination of cadmium in practical samples with satisfactory results.
出处
《化学分析计量》
CAS
1999年第2期13-14,共2页
Chemical Analysis And Meterage
基金
湖南省教育委员会资助项目(97B124)
关键词
分光光度法
测定
镉
显色反应
HDNPAPT
l-(2-hydroxy-3,5-dinitrophenyl)-3-(4-phenylazophenyl)-triazene,cadmium,color reaction
