Process for measuring concentration of nonionic surfactants in a

Details Process for measuring concentration of nonionic surfactants in a Process for measuring concentration of nonionic surfactants in a

1998-01-28

2000-01-25

Snay, Jeffrey

Chemistry: analytical and immunological testing

Optical result

436166, 436178, G01N 2178

Patent

active

060177667

ABSTRACT:
The present invention is a process for precisely measuring the concentration of a nonionic surfactant in an aqueous alkaline solution. The process comprises extracting the surfactant into an organic solvent, separating the solvent and forming a colored complex that can be quantitatively measured to give the actual concentration of the surfactant.

REFERENCES:
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patent: 4863827 (1989-09-01), Jain et al.
patent: 5039595 (1991-08-01), Schwam et al.
BASF Corporation, Performance Review, 1991.
Analytical Biochemistry 187, 54-55 (1990) "Colorimetric Assay for Pluronic F-68 as Measured in Isolated Rat Liver Perfusion Systems" A. M. Tercyak et al.
Environmental Science & Technology, vol. 11, p. 1167, Dec. 1977, American Chemical Society, "Analytical Method for Nonionic Surfactans in Laboratory Biodegradation and Environmental Studies" Boyer et al.
5540 B. Surfactant Separation by Sublation pp. 5-34-5-36, and 5540 D. Nonionic Surfactants as CTAS pp. 5-39-5-41.

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