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Updated: Sep 30, 2026

Extraction and Characterization of Surfactants from Atmospheric Aerosols
Published on: April 21, 2017
Identification of unknown surfactants using electrospray mass spectrometry and NMR spectroscopy preceded by liquid
Yukio Yokoyama1, Yoshiyuki Fukazawa, Takashi Ito
1Department of Analytical Chemistry, Faculty of Engineering, Yokohama National University, Hodogaya, Japan. yokyuk@ynu.ac.jp
Abstract:
Commercially available but completely unknown surfactants used in the tin-lead plating industry were successfully identified by using electrospray mass spectrometry and NMR spectroscopy techniques, preceded by liquid ionization mass spectrometry used to obtain the preliminary information. The mass spectral data suggested that ethoxylated nonionic surfactants having a homologous distribution of molecular weights like 520, 564, 608, 652, 696, etc. were present. The NMR data suggested the presence of two aromatic rings and a quaternary carbon for the hydrophobe moiety instead of the well-known alkyl chains or alkylphenols. The unknown surfactants were finally concluded to be novel nonionic 4-(alpha,alpha-dimethylbenzyl)-phenol ethoxylates.
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