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Quantitative determination of ethylene oxide oligomer distribution in ethoxylated alkylphenol carboxymethyl ether salts by thin‐layer chromatography
Author(s) -
Yang Jiang,
Zhang Lufang,
Li Xiangrong
Publication year - 1994
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/bf02541481
Subject(s) - alkylphenol , oligomer , ethylene oxide , ether , chemistry , chromatography , thin layer chromatography , pulmonary surfactant , column chromatography , silica gel , oxide , gel permeation chromatography , organic chemistry , copolymer , alkyl , biochemistry , polymer
A two‐dimensional thin‐layer chromatographic (TLC) method was used to separate a mixture of ethoxylated alkylphenol carboxymethyl ether salts and unconverted ethoxylated alkylphenol ether with the first eluent, which was then developed at right angles with EtOAc/HOAc/H 2 O as the second eluent to resolve the individual ethylene oxide oligomer adducts. Scanning densitometry was used for quantitation. The surfactant's degree of conversion, average ethoxylate number and its distribution were simultaneously determined on a single TLC plate.