Characterization and quantitative analysis of surfactants in textile wastewater by liquid chromatography/quadrupole-time-of-flight mass spectrometry
Article first published online: 8 APR 2008
Copyright © 2008 John Wiley & Sons, Ltd.
Rapid Communications in Mass Spectrometry
Volume 22, Issue 10, pages 1445–1454, 30 May 2008
How to Cite
González, S., Petrović, M., Radetic, M., Jovancic, P., Ilic, V. and Barceló, D. (2008), Characterization and quantitative analysis of surfactants in textile wastewater by liquid chromatography/quadrupole-time-of-flight mass spectrometry. Rapid Commun. Mass Spectrom., 22: 1445–1454. doi: 10.1002/rcm.3527
- Issue published online: 8 APR 2008
- Article first published online: 8 APR 2008
- Manuscript Accepted: 6 MAR 2008
- Manuscript Revised: 3 MAR 2008
- Manuscript Received: 9 JAN 2008
- EU Project EMCO. Grant Number: INCO-CT-2004-509188
- Spanish Ministerio de Educación y Ciencia Project CEMAGUA. Grant Number: CGL2007-64551
A method based on the application of ultra-performance liquid chromatography (UPLC) coupled to hybrid quadrupole-time-of-flight mass spectrometry (QqTOF-MS) with an electrospray (ESI) interface has been developed for the screening and confirmation of several anionic and non-ionic surfactants: linear alkylbenzenesulfonates (LAS), alkylsulfate (AS), alkylethersulfate (AES), dihexyl sulfosuccinate (DHSS), alcohol ethoxylates (AEOs), coconut diethanolamide (CDEA), nonylphenol ethoxylates (NPEOs), and their degradation products (nonylphenol carboxylate (NPEC), octylphenol carboxylate (OPEC), 4-nonylphenol (NP), 4-octylphenol (OP) and NPEO sulfate (NPEO-SO4)). The developed methodology permits reliable quantification combined with a high accuracy confirmation based on the accurate mass of the (de)protonated molecules in the TOFMS mode. For further confirmation of the identity of the detected compounds the QqTOF mode was used. Accurate masses of product ions obtained by performing collision-induced dissociation (CID) of the (de)protonated molecules of parent compounds were matched with the ions obtained for a standard solution. The method was applied for the quantitative analysis and high accuracy confirmation of surfactants in complex mixtures in effluents from the textile industry. Positive identification of the target compounds was based on accurate mass measurement of the base peak, at least one product ion and the LC retention time of the analyte compared with that of a standard. The most frequently surfactants found in these textile effluents were NPEO and NPEO-SO4 in concentrations ranging from 0.93 to 5.68 mg/L for NPEO and 0.06 to 4.30 mg/L for NPEO-SO4. AEOs were also identified. Copyright © 2008 John Wiley & Sons, Ltd.