四碘酚酞磺酸钠作为一种光谱替代物用于表征阳离子和阴离子表面活性剂之间的络合作用。

Tetraiodophenolsulfonphthalein as a spectral substitute to characterize the complexation between cationic and anionic surfactant.

作者信息

Gao Hong-Wen, Qian Yan, Hu Zhang-Jun

机构信息

Key Laboratory of Changjiang River Water Environment of Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, People's Republic of China.

出版信息

J Colloid Interface Sci. 2004 Nov 1;279(1):244-52. doi: 10.1016/j.jcis.2004.06.051.

DOI:10.1016/j.jcis.2004.06.051

PMID:15380435

Abstract

The complexation of cetyltrimethylammonium bromide (CTAB) with sodium dodecyl sulfate (SDS) with sodium dodecyl benzene sulfonate (SDBS), with tetraiodophenolsulfonphthalein (TIPST) as a spectral substitute was investigated at pH 5.89 and 8.30 by the microsurface adsorption--spectral correction (MSASC) technique. The aggregations of TIPST, SDS, and SDBS on CTAB obeyed the Langmuir isothermal adsorption. The aggregates TIPST-CTAB, TIPST2-CTAB3, SDS3-CTAB2, and SDBS3-CTAB2 were formed at 20 degrees C and the binding constants of all the aggregates were determined. The replacement of TIPST-binding CTAB monomer with SDS or SDBS at pH 5.89 was applied to the quantitative determination of anionic detergent (AD) in water with satisfactory recovery.

摘要

在pH值为5.89和8.30的条件下，采用微表面吸附-光谱校正（MSASC）技术，以四碘酚磺酞（TIPST）作为光谱替代物，研究了十六烷基三甲基溴化铵（CTAB）与十二烷基硫酸钠（SDS）、十二烷基苯磺酸钠（SDBS）的络合情况。TIPST、SDS和SDBS在CTAB上的聚集遵循朗缪尔等温吸附。在20℃时形成了聚集体TIPST-CTAB、TIPST2-CTAB3、SDS3-CTAB2和SDBS3-CTAB2，并测定了所有聚集体的结合常数。在pH值为5.89时，用SDS或SDBS替代与TIPST结合的CTAB单体，用于水中阴离子洗涤剂（AD）的定量测定，回收率令人满意。