Startseite Automated Determination of Linear Alkylbenzene Sulphonate (LAS) in Wastewater Treatment Plants Effluents Using on Line Solid-phase Extraction Followed by HPLC with Fluorescence Detection
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Automated Determination of Linear Alkylbenzene Sulphonate (LAS) in Wastewater Treatment Plants Effluents Using on Line Solid-phase Extraction Followed by HPLC with Fluorescence Detection

  • C. Crey-Desbiolles , S. Cavalli , S. Polesello und S. Valsecchi
Veröffentlicht/Copyright: 5. April 2013
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Abstract

An on line SPE (solid-phase extraction) method followed by HPLC with fluorescence detection has been developed and validated for determining the LAS in inlet and outlet effluents of wastewaters treatment plants. Filtered effluent samples were on line concentrated on a small polymeric reversed phase column, then the trapped LAS are separated on a specialty polar-embedded reversed-phase column and detected by a fluorimeter. The on line SPE method with fluorescence detection showed very good repeatability (from 1.5 to 11.7% depending on the sample loading volume) and robustness with detection limits of 1.5 μg l−1 for total C10–13 LAS loading a 5 ml sample volume. This automated method is a cost-effective way to determine LAS also in routine monitoring of inlets and outlets of wastewater treatment plants allowing to optimize treatment procedures.

Kurzfassung

Eine online Festphasenextraktion (solid phase extraction; SPE) mit nachfolgender HPLC und Fluoreszenz-Detektion wurde zur Bestimmung von LAS im Zulauf und Ablauf von Kläranlagen entwickelt und validiert. Die filtrierten Abwasserproben wurden online auf einer kurzen unpolaren Säule aufkonzentriert. Danach wurden die adsorbierten LAS auf einer speziellen polaren RP-Trennsäule (polar-embedded) eluiert, getrennt und mit Fluoreszenz-Detektion nachgewiesen. Die online SPE-Methode weist eine sehr gute Wiederholbarkeit (von 1,5 bis 11,7% abhängig vom aufgegebenen Probenvolumen) und hohe Robustheit mit Nachweisgrenzen von 1,5 μg l−1 für C10–13 LAS bei 5 mL Probenvolumen auf. Diese automatisierte Methode ist eine kostengünstige Möglichkeit zur Bestimmung von LAS auch in der Routineüberwachung von Zu- und Abläufen von Kläranlagen.

Stichwörter:: LAS; online SPE; HPLC; Abwasser

Stefano Polesello, IRSA-CNR, Via Mornera 25, I-20047 Brugherio (MI), Italy, Tel.: ++39-03921694223-211, Fax: ++39-0392004692, E-Mail:

Caroline Crey-Desbiolles is an analytical chemist at central laboratories of Dionex (Europe), Olten, Switzerland.

Silvano Cavalli works as application manager at Dionex (Europe) Olten, Switzerland. He published many papers and books on ion chromatography and electrochemistry detection in HPLC.

Stefano Polesello received his Ph.D. in Analytical Chemistry from the University of Milano in 1994. He joined the Water Research Institute (CNR-IRSA) as an associate researcher in 1996. Since 2003 he is Senior Researcher in the same Institute. Main research fields are the development and validation of advanced analytical methods for analysis of emerging pollutants in water; risk assessment of priority and emerging pollutants in internal and coastal waters; chemistry of atmospheric deposition in high altitude and remote areas; glaciochemistry.

Sara Valsecchi is a researcher at Water Research Institute (CNR-IRSA) and her main research field is the impact of organic pollutants in the environment.


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Received: 2009-04-02
Revised: 2009-06-23
Published Online: 2013-04-05
Published in Print: 2009-11-01

© 2009, Carl Hanser Publisher, Munich

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