Premium
Analysis of polar hydrophilic aromatic sulfonates in waste water treatment plants by CE/MS and LC/MS
Author(s) -
Loos Robert,
Riu Josep,
Alonso Mari Carmen,
Barceló Damià
Publication year - 2000
Publication title -
journal of mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 1076-5174
DOI - 10.1002/1096-9888(200010)35:10<1197::aid-jms51>3.0.co;2-o
Subject(s) - chemistry , chromatography , electrospray ionization , electrospray , effluent , detection limit , mass spectrometry , ammonium acetate , solid phase extraction , capillary electrophoresis , tandem mass spectrometry , extraction (chemistry) , analytical chemistry (journal) , high performance liquid chromatography , environmental engineering , engineering
The present work describes the development and optimization of a capillary (zone) electrophoresis/mass spectrometric (CE/MS) analysis method for polar hydrophilic aromatic sulfonates (ASs). The compounds were detected by negative ion electrospray ionization (NIESI) and selected ion monitoring (SIM). In comparison with CE/UV, for CE/MS a lower‐concentration volatile ammonium acetate buffer (5 m M ) without organic modifier and a higher separation voltage were better suited for separation. Sensitivity of CE/MS was slightly better than for CE/UV, with the limit of detection (LOD) ranging between 0.1 and 0.4 mg l −1 . For verification of the CE/MS results, ASs were also analysed by ion‐pair liquid chromatography/diode array UV detection coupled in series with electrospray mass spectrometry (IPC/DAD/ESI‐MS). Real water samples of different waste water treatment plants (WWTPs) in Catalonia (NE Spain) were extracted by solid‐phase extraction (SPE) with LiChrolut EN and analysed with CE/MS and LC/MS. ASs were found in influent and effluent water samples of the WWTPs in the µg l −1 concentration range. LC/MS offered a higher separation efficiency and sensitivity than CE/MS. Therefore with LC/MS more compounds could be identified in the WWTPs. The persistency of the ASs was distinct: some compounds were well degraded during the water treatment process, while others were quite persistent. Copyright © 2000 John Wiley & Sons, Ltd.