Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1401, Issue -, Pages 9-16Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2015.04.052
Keywords
Micro-solid-phase extraction; MIL-101; Organochlorine pesticides; Gas chromatography-mass spectrometry
Funding
- National Research Foundation-Prime Minister's Office, Republic of Singapore under its Environmental & Water Technologies Strategic Research Programme [R143-000-438-272]
- National University of Singapore
- EWI
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In this study, a metal-organic framework material, MIL-101, used as a micro-solid-phase extraction (mu-SPE) sorbent for efficient enrichment of five organochlorine pesticides (OCPs), including alpha-HCH, Aldrin, a-Chlordane, Dieldrin and p,p'-DDD from water samples, followed by gas chromatography mass spectrometry, is reported. This study demonstrated a new application of MIL-101 using mu-SPE, an advantage of the latter being its ability to process complex aqueous matrices, due to the protection of the sorbent afforded by the hollow fiber membrane bag. Key factors affecting extraction efficiency were studied, including elution solvent, extraction and desorption time. Under the optimal extraction conditions, the calibration plots were linear from 0.05 to 50 ng/mL for alpha-HCH and p,p'-DDD, and 0.1 to 50 ng/mL for the other three analytes. The limits of detection were between 0.0025 and 0.016 ng/mL. The relative recoveries of the OCPs spiked into real water samples (at 5 ng/mL of each analyte) ranged from 87.6 to 98.6% with relative standard deviations of <10%. (C) 2015 Elsevier B.V. All rights reserved.
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