Analysis of persistent organic pollutants in marine sediments using a novel microwave assisted solvent extraction and liquid-phase microextraction technique

Basheer Chanbasha, Jeffrey Philip Obbard, Hian Kee Lee

Research output: Contribution to journalJournal articlepeer-review

90 Scopus citations

Abstract

A simple and novel analytical method for quantifying persistent organic pollutants (POPs) in marine sediments has been developed using microwave assisted solvent extraction (MASE) and liquid-phase microextraction (LPME) using hollow fibre membrane (HFM). POPs studied included twelve organochlorine pesticides (OCP) and eight polychlorinated biphenyl (PCB) congeners. MASE was used for the extraction of POPs from 1 g of sediment using 10 ml of ultrapure water at 600 W for 20 min at 80°C. The extract was subsequently subjected to a single step LPME-HFM cleanup and enrichment procedure. Recovery varied between 73 and 111% for OCPs; and 86-110% for PCBs, and exceeded levels achieved for conventional multi-step Soxhlet extraction coupled with solid-phase extraction. The method detection limit for each POP analyte ranged from 0.07 to 0.70 ng g-1, and peak areas were proportional to analyte concentrations in the range of 5-500 ng g-1. Relative standard deviations of less than 20% was obtained, based on triplicate sample analysis. The optimized technique was successfully applied to POP analysis of marine sediments collected from the northeastern and southwestern areas of Singapore's coastal environment.

Original languageEnglish
Pages (from-to)221-228
Number of pages8
JournalJournal of Chromatography A
Volume1068
Issue number2
DOIs
StatePublished - 18 Mar 2005
Externally publishedYes

Keywords

  • Hollow fibre membrane
  • Liquid-phase microextraction
  • Persistent organic pollutants
  • Sediment analysis

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