In-tube solid-phase microextraction sampler for long-term storage

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Capillary extractors are proposed as samplers-preconcentrators to overcome losses of volatile organic compounds found using "classical" solid-phase microextraction fiber-holder samplers. A set of equal-size extractors was used to extract in-tube an aqueous solution of benzene, toluene, ethylbenzene and xylenes (BTEX) at 146 ppb. After storage for 6-30 days at 0-4°C (or -15°C) GC analyses were carried out to study BTEX recovery. Results demonstrated that sample preservation was very good: recovery was higher than 98% after 6 days, and more than 95% after 30 days. Capillary extractors, due to their high performance in preserving sample integrity, represent a real breakthrough for on-site sampling of volatile compounds by solid-phase pre-concentration techniques. © 2002 Elsevier Science B.V. All rights reserved.
Original languageEnglish
Pages (from-to)93 - 98
Number of pages6
JournalJournal of Chromatography A
Issue number1-2
Publication statusPublished - 24 Jan 2003
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Analytical Chemistry

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