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Detergents in Wisconsin Waters
Author(s) -
Lawton Gerald W.
Publication year - 1967
Publication title -
journal ‐ american water works association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.466
H-Index - 74
eISSN - 1551-8833
pISSN - 0003-150X
DOI - 10.1002/j.1551-8833.1967.tb03460.x
Subject(s) - methylene blue , chloroform , pulmonary surfactant , salt (chemistry) , chemistry , methylene , chromatography , organic chemistry , biochemistry , photocatalysis , catalysis
This article discusses an analytic procedure for detergents that is a modification of the methylene blue method given in Standard Methods. This method is based upon the formation of a blue salt, when methylene blue reacts with anionic surfactants. The salt is soluble in chloroform, and the intensity of the color is proportional to the concentration of the surfactant. The color intensity was measured spectrophotometrically. Various substances that occur in water can interfere. Most interfering substances produce positive errors leading to results that are probably greater than the true value. The minimum concentration detectable by this procedure is about 0.03 mg/l.