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Separation and determination of C 21 dicarboxylic acid and xylenesulfonate hydrotropes in mixtures with dodecylbenzenesulfonate
Author(s) -
Li ZhiPing,
Rosen M. J.
Publication year - 1982
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02636151
Subject(s) - chemistry , acetone , chloroform , sodium dodecylbenzenesulfonate , elution , isopropyl alcohol , methanol , chromatography , isopropyl , titration , isoamyl alcohol , alcohol , nuclear chemistry , inorganic chemistry , organic chemistry , aqueous solution
Column chromatographic procedures have been developed for separating binary mixtures of commercial sodium dodecylbenzenesulfonate (DDBS) with the hydrotropes sodium m ‐xylenesulfonate (SXS) and 8‐[5(6)‐carboxy‐4‐hexyl‐cyclohex‐2‐enyl] octanoic acid (DAC) and ternary mixtures of these three materials. The materials are separated on a specially purified silica gel column. The C 21 dicarboxylic acid (DAC) is eluted with 2:3 (v/v) chloroform/acetone in the presence of SXS, with 3:2 (v/v) chloroform/acetone in its absence. The DDBS is eluted with 1:9 (v/v) isopropyl alcohol/acetone in the presence of SXS, with methanol in its absence. The SXS is eluted with methanol in the presence of DAC, with 8:2 (v/v) isopropyl alcohol/acetone in its absence. The presence of SXS in mixtures with DDBS in greater than equimolar amounts interferes with the Hyamine 1622, mixed indicator titration for DDBS.