Tetraiodophenolsulfonphthalein as a spectral substitute to characterize the complexation between cationic and anionic surfactant.
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.
Gao
Hong-Wen
HW
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. hwgao@mail.tongji.edu.cn
Qian
Yan
Y
Hu
Zhang-Jun
ZJ
D000327:Adsorption; D000838:Anions / Q000737:chemistry; D001557:Benzenesulfonates / Q000737:chemistry; D002412:Cations / Q000737:chemistry; D000077286:Cetrimonium; D002593:Cetrimonium Compounds / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D008956:Models, Chemical; D015394:Molecular Structure; D010636:Phenols / Q000737:chemistry*; D012967:Sodium Dodecyl Sulfate / Q000737:chemistry; D013499:Surface Properties; D013501:Surface-Active Agents / Q000737:chemistry*
D000838:Anions; D001557:Benzenesulfonates; D002412:Cations; D002593:Cetrimonium Compounds; D010636:Phenols; D013501:Surface-Active Agents; D012967:Sodium Dodecyl Sulfate; C034202:iodophenol blue; C001114:dodecylbenzenesulfonic acid; D000077286:Cetrimonium