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Selective pressurized liquid extraction for multi-residue analysis of organochlorine pesticides in soil

In English

Författare

  • Ahmed Hussen
  • Rikard Westbom
  • Negussie Megersa
  • Lennart Mathiasson
  • Erland Björklund

Summary, in English

A selective pressurized liquid extraction (SPLE) procedure capable of performing simultaneous extraction and clean-up has been demonstrated for multi-residue analysis of organochlorine pesticides (OCPs) in soil. The final method was performed at 100 degrees C for 3 x 10 min using acetone/n-heptane (1:1, v/v). Florisil was placed inside the extraction cell downstream the sample to remove interfering compounds. Extraction of two soil samples by SPLE gave a recovery which was over 80% for beta-endosulfan, endosulfan sulfate, p,p'-DDT and p,p'-DDE compared to PLE with off-line clean-up. The same trend was observed when applying the SPLE method to a certified reference soil sample (CRM 811-050) containing 13 OCPs, where the SPLE method gave 80-90% recovery vis-a-vis the PLE method with off-line clean-up. Feasibility of the SPLE method was further demonstrated by applying it to five real soil samples collected in Ethiopia. (C) 2007 Published by Elsevier B.V.

Publiceringsår

2007

Språk

Engelska

Sidor

247-253

Publikation/Tidskrift/Serie

Journal of Chromatography A

Volym

1152

Issue

1-2

Dokumenttyp

Artikel i tidskrift

Förlag

Elsevier

Ämne

  • Analytical Chemistry

Nyckelord

  • soil
  • OCPs
  • organochlorine
  • selective pressurized liquid extraction
  • SPLE
  • pesticides

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0021-9673