摘要
研究了显色剂邻羟基苯基重氮氨基偶氮苯 ( HDAA)与季铵盐型表面活性剂的显色反应。在 0 .1 mol·L- 1的氢氧化钠介质中 ,试剂与溴化十六烷基三甲胺 ( CTMAB)、溴化十六烷基吡啶 ( CPB)和氯化十六烷基吡啶分别形成玫瑰红色离子缔合物 ,缔合比均为 1∶ 3,CTMAB体系 λmax=558nm,CPB和 CPC体系 λmax=562 nm,表观摩尔吸光系数分别为 1 .34× 1 0 4 ,1 .0 3× 1 0 4 和 1 .4 7× 1 0 4 L·mol- 1 ·cm- 1 。探讨了微量 CTMAB、CPB和 CPC的测定方法 ,结果满意。
The color reaction of o hydroxybenzenediazoaminoazobenzene (HDAA) with surfactants of guaternary ammonium salts was studied and reported in this paper. In 0.1mol·L -1 NaOH medium, the reagent reacts with cethyltrimethylammonium bromide (CTMAB), cetylpyridinium bromide (CPB) or cetylpylpyridinium chloride (CPC) to form a rose red ion pair complex and all of their molar ratioes are 1∶3. The maximum absorption wavelength of the complex is at 558nm for CTMAB, 562nm for CPB and CPC. The apparent molar absorptivity of CTMAB, CPB and CPC are 1.34×10 4, 1.03×10 4 and 1.47×10 4L·mol -1 ·cm -1 respectivily. The method has been used to determine CTMAB, CPB or CPC in tap water with satisfactory result.
出处
《理化检验（化学分册）》
CSCD
北大核心
2000年第1期3-4,7,共3页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
关键词
显色反应
季铵盐
HDAA
表面活性剂
Cethyltrimethylammonium bromide Cetylpyridinium bromide Cetylpylpyridinium chloride
o
Hydroxybenzenediazoaminoazobenzene Tap water Color raction
