分析化学2011，Vol.39Issue(12)：1882-1886,5.DOI:10.3724/SP.J.1096.2011.01882
氯金酸共振光散射探针测定阳离子表面活性剂
Determination of Cationic Surfactants with Chloroauric Acid for Resonance Light Scattering
王雪 1吴立航 1陈艳华 1梁芳慧 2邓新煜 1刘贺 1张寒琦 1田媛1
作者信息
- 1. 吉林大学化学学院,长春130021
- 2. 长春医学高等专科学校,长春130013
- 折叠
摘要
Abstract
The chloroauric acid anion was applied as resonance light scattering (RLS) probe for the determination of three kinds of cationic surfactants, cetyltrimethyl ammonium bromide (CTMAB), cetyl trimethyl ammonium chloride (CTMAC), cetylpyridinium bromide (CPB) separately in HC1-NaAc (Ph = 2. 0) buffer solution. The reaction between chloroauric acid anion and cationic surfactants was because of their electrostatic attraction, which can form a stable ion-association complex, thus the RLS intensity of system increased. The characteristic peak was located at 400 nm. Another two peaks were also observed at 227 nm and 590 nm. The optimization conditions of the reaction were examined at 400 nm. Under the selected conditions, the enhanced RLS intensity showed a good linear relation-ship with the cationic surfactants concentrations in the range of 8. 00×10-7-1. 50×10-5 mol/L for CTMAB, 1. 00 × 10-7 - 1. 50 × 10-5 mol/L for CTMAC and 2. 50 × 10-7 - 1. 00 × 10-5 mol/L for CPB, respectively, the detection limits for CTMAB, CTMAC and CPB were 4. 01 × 10-8, 4. 06 × 10-8 and 4. 72×10-8 mol/L, respectively. The effect of some coexistent substances was aexamined. Some real samples were analyzed by the RLS method. The results of this method were consistent with those of spectrophotometric method.关键词
氯金酸/阳离子表面活性剂/共振光散射Key words
Chloroauric acid/ Cationic surfactants/ Resonance light scattering引用本文复制引用
王雪,吴立航,陈艳华,梁芳慧,邓新煜,刘贺,张寒琦,田媛..氯金酸共振光散射探针测定阳离子表面活性剂[J].分析化学,2011,39(12):1882-1886,5.
