Gao Hong-Wen, Qian Yan, Hu Zhang-Jun
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.
J Colloid Interface Sci. 2004 Nov 1;279(1):244-52. doi: 10.1016/j.jcis.2004.06.051.
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.
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。
