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Adsorptive stripping tensammetry of commercially available oxyethlated alcohols. Part 1. Surfactants having C 10 –C 13 hydrophobes
Author(s) -
Szymanski Andrzej,
Lukaszewski Ze
Publication year - 1991
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.1140030104
Subject(s) - pulmonary surfactant , dodecanol , methanol , chemistry , monomer , stripping (fiber) , chromatography , analytical chemistry (journal) , materials science , organic chemistry , polymer , biochemistry , composite material
Abstract The behavior of oxyethylated oxoalcohols (e.g., Oxetals D104, T105, and C114, and oxyethylated n ‐dodecanol BRIJ‐35) was investigated. The dependence of peak height on concentration of surfactant, preconcentration time, and preconcentration potential was examined. To improve the analytical signal of Oxetals C114 and T105, the influence of methanol on their tensammetric curves was investigated. Roughly, all the surfactants exhibit two peaks: a wide one, corresponding the monomer form, which shifts toward the negative direction with an increase in concentration, and a narrow one, corresponding to the associate form, whose position is stable. Oxetals C114 and T105 exhibit additional peaks, which complicate the determination. The addition of 20% of methanol removes such difficulties and only one peak remains.