Water absorption properties of lanolin (analysis of nonionic detergents affecting absorptive properties) | Health & Environmental Research Online (HERO)

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HERO ID

3118197

Reference Type

Journal Article

Title

Water absorption properties of lanolin (analysis of nonionic detergents affecting absorptive properties)

Author(s)

Clark, EW

Year

1971

Is Peer Reviewed?

Journal

Journal of the Society of Cosmetic Chemists
ISSN: 0037-9832

Report Number

IPA/72/48173

Volume

Soc

Issue

REF 29

Page Numbers

421-437

Language

English

Abstract

IPA COPYRIGHT: ASHP A method for determining polyoxyethylene detergents in lanolin is described. The presence of such detergents can affect the water absorption properties of lanolin. In this method, detergent is extracted into 70% v/v isopropanol from a solution of the sample in octane, precipitated with molybdophosphoric acid, degreased with diethyl ether, oxidized with perchloric acid and reduced with metol/sulfite to molybdenum blue. The color intensity is measured on a photoelectric colorimeter. Accuracy is 0.03 as % sample (detergent known) or -0.06 to +0.05% (detergent unknown). Stated detergents are recoverble sufficiently pure for identification by IR spectra and their bulk removal from lanolin and wool grease by extraction with 45% isopropanol is demonstrated. The method has been successfully applied to the analysis of 7 nonionic detergents of the ethoxylated alkylphenol or ethoxylated linear alcohol type in lanolin or centrifuged wool grease.