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Analysis of polyethylene oxide adducts by cleavage with hydrobromic acid in acetic acid and subsequent gas-chromatographic determination of the reaction products

Analyse von Polyäthylenoxid-Addukten durch Spaltung mit Bromwasserstoffsäure in Eisessig und anschließende gas-chromatographische Identifizierung der Reaktionsprodukte

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Zusammenfassung

Eine Methode wird beschrieben, die es ermöglicht, sowohl den Äthylenoxidgehalt wie die Art und Verteilung der Alkylketten von Polyäthylenoxidaddukten in einem Gang festzustellen. Bisher waren mit der quantitativen Analyse dieser Produkte viele Schwierigkeiten verbunden.

Die Polyäthylenoxidaddukte werden in abgeschmolzenen Glasröhren mit einer 40% igen Lösung von Bromwasserstoffsäure in Eisessig gespalten, wonach die Spaltungsprodukte gas-chromatographisch identifiziert werden. Einige mit dieser Methode an gesättigten sowie ungesättigten äthoxylierten Fettalkoholen, phosphatierten Polyoxyäthylenalkyläthern, äthoxylierten Aminen und äthoxylierten Estern erzielte Resultate werden erörtert.

Summary

A method is discussed by which both the ethylene oxide content and the nature and distribution of the alkyl chains of polyethylene oxide adducts can be determined in one step. Until recently the quantitative analysis of these products gave rise to many difficulties.

The method includes a fission of the polyethylene oxide adducts with a 40% solution of hydrobromic acid in glacial acetic acid in sealed glass tubes, after which the fission products are determined gas-chromatographically. Results are given for saturated as well as unsaturated ethoxylated fatty alcohols, phosphated polyoxyethylene alkyl ethers, ethoxylated amines and ethoxylated esters.

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Authors and Affiliations

  1. Corporate Research Department, Akzo Research Laboratories, Arnhem, The Netherlands

    C. Slagt, J. M. H. Daemen, W. Dankelman & W. A. Sipman

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  1. C. Slagt
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  2. J. M. H. Daemen
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  3. W. Dankelman
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  4. W. A. Sipman
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Slagt, C., Daemen, J.M.H., Dankelman, W. et al. Analysis of polyethylene oxide adducts by cleavage with hydrobromic acid in acetic acid and subsequent gas-chromatographic determination of the reaction products. Z. Anal. Chem. 264, 401–406 (1973). https://doi.org/10.1007/BF00423644

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  • DOI: https://doi.org/10.1007/BF00423644

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