Nonylphenol polyoxyethylene ether（NPEO）It is an anhydrous mixture formed by the condensation of nonylphenol and epoxyethane, and belongs to non-ionic surfactants.NPEOIt has a wide range of applications in the fields of detergents, printing and dyeing, and chemical engineering, with certain abilities of penetration, emulsification, dispersion, acid and alkali resistance, reduction resistance, and oxidation resistance. However, at the same time,NPEOHas high biodegradability and may have toxic effects on aquatic organisms in the environment.

NPEOIt is a homologous mixture composed of different degrees of polymerization and different nonyl structures. Currently, it isNPEOThe detection methods for its degradation products mainly include gas chromatography tandem mass spectrometry（GC-MS）And liquid chromatography method（HPLC）Among themHPLCThe detection method is relatively simple, the reagent toxicity is low, and it can simultaneously separate different substancesEONumber. Therefore, in this experiment, the liquid chromatography tandem evaporative light scattering detector method was used, and a special chromatographic column separation mode was configured to achieve different separation modesEOThe number ofNPEOtesting.