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The analysis of alkyl‐capped alcohol ethoxylates and alcohol ethoxycarboxylates from alcohol ethoxylates by atmospheric pressure chemical ionization mass spectrometry
Author(s) -
Huang S. K.,
Rood M. H.
Publication year - 1999
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/(sici)1097-0231(19990630)13:12<1152::aid-rcm631>3.0.co;2-z
Subject(s) - chemistry , atmospheric pressure chemical ionization , mass spectrometry , alcohol , desorption electrospray ionization , derivatization , chemical ionization , alkyl , chromatography , analytical chemistry (journal) , silylation , ionization , organic chemistry , ion , catalysis
Alcohol ethoxylates (AEs) are nonionic surfactants. They are industrially important compounds that have historically been difficult to analyze, with the best results to date achieved through derivatization (e.g., silylation) followed by analysis by gas chromatography/mass spectrometry (GC/MS). Recently, mass spectrometric techniques such as field desorption (FD), time‐of‐flight secondary ion mass spectrometry (TOF‐SIMS), fast atom bombardment (FAB), electrospray ionization (ESI) and matrix‐assisted laser desorption/ionization (MALDI) have been employed to analyze surfynol® 4xx. In an effort to produce low‐cost alkyl‐capped AEs and anionic detergents from AEs, a fast and reliable measure of the product yields and conversions from AEs is required in research. We found that the product yields and conversions from reactions of AEs, obtained by the employment of atmospheric pressure chemical ionization (APCI), were in good agreement with those obtained from proton nuclear magnetic resonance spectroscopy ( 1 H−NMR). Therefore, APCI can be used as a validated tool for studying AE reactions. Mixtures that contain either silylated or unsilylated ethoxylates and/or carboxylates yield the same APCI mass spectra. Copyright © 1999 John Wiley & Sons, Ltd.