摘要
研究了在溴化十六烷基三甲基铵（ＣＴＭＡＢ）／正戊醇／正庚烷／水组成的阳离子型微乳液中Ｃｒ（Ⅵ）与水杨基荧光酮（ＳＡＦ）的显色反应。结果表明，微乳液对Ｃｒ（Ⅵ）－ＳＡＦ显色体系有较好的增敏作用。在ｐＨ６．７～６．９的（ＣＨ２）６Ｎ４－ＨＣｌ缓冲溶液中，经７０℃水浴加热１０～１５ｍｉｎ，Ｃｒ（Ⅵ）－ＳＡＦ在微乳液介质中形成一紫红色配合物，ε５６６达１．２３×１０５Ｌ·ｍｏｌ－１·ｃｍ－１，Ｃｒ（Ⅵ）浓度在每２５ｍＬ０～６μｇ范围内遵守比尔定律。在ＣＹＤＴＡ和ＮａＦ掩蔽下，对实际水样进行测定，结果满意。
The color reaction between Cr(Ⅵ) and salicylfluorone(SAF) in cationic microemulsion of CTMAB/n C 5H 11 OH/n C 7H 16 /H 2O has been studied.The results show that the sensitizing effect of microemulsion medium on the color reaction of Cr(Ⅵ) and SAF is good.In (CH 2) 6N 4 HCl buffer solution at pH 6.7～6 9 under heating in a 70℃ water bath for 10～15min ,Cr(Ⅵ) reacts with SAF to form a purple complex.The molar absorptivity is 1.23×10 5 L·mol -1 ·cm -1 at 566nm.Beer's law is obeyed for 0～6μg of Cr(Ⅵ) in 25mL solution.Under the masking of CYDTA and NaF,it has been used to water samples with satisfactory results.
出处
《分析试验室》
CAS
CSCD
1997年第6期29-32,共4页
Chinese Journal of Analysis Laboratory
关键词
微乳液
水杨基荧光酮
铬
分光光度法
显色反应
Microemulsion
salicylfluorone
chromium
spectrophotometric determination
