New Anionic Surfactant Two-phase Extraction Systems and Their Applications to Porphyrins and Dyes

Abstract

Abstract: In this paper, two anionic two-phase systems, sodium dodecyl sulfate(SDS)-dodecyl triethylammonium bromide(C₁₂NE) and sodium perfluorooctanoate (SPFO)-C₁₂NE, were established. A two-phase system with a clear interfacial boundary formed spontaneously under certain surfactant concentrations and molar ratios, respectively for the above two mixtures. Phase separation conditions and their properties were studied. Extractions of dyes and porphyrin compounds were performed. The results show that hydrophobic molecules are easily extracted into the surfactant-rich phase of SPFO-C₁₂NE or into the "aqueous phase" of SDS-C₁₂NE. Positively charged porphyrins are extracted with higher extraction efficiencies than negatively charged porphyrins. The extraction results for charged porphyrins are opposite to those extracted with cationic two-phase of C₁₂NE-SDS mmixture, indicating that anionic two phase systems are complementary to the cationic two-phase systems.

Key words: Ionic surfactant, Aqueous two-phase, Dye, Porphyrin, Extraction

CLC Number:

O652.6

TrendMD:

TONG Ai-Jun, DONG Jian-Jun, YIN Mu-Sheng, LI Long-Di . New Anionic Surfactant Two-phase Extraction Systems and Their Applications to Porphyrins and Dyes[J]. Chem. J. Chinese Universities, 1999, 20(11): 1717.

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New Anionic Surfactant Two-phase Extraction Systems and Their Applications to Porphyrins and Dyes

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