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Title of Journal: Microchim Acta

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Abbravation: Microchimica Acta

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Springer Vienna

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DOI

10.1007/bf00804484

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1436-5073

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Ionic liquidbased headspace singledrop microextr

Authors: Faqiong Zhao Shuang Lu Wei Du Baizhao Zeng
Publish Date: 2008/07/31
Volume: 165, Issue: 1-2, Pages: 29-33
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Abstract

A novel method based on the coupling of ionic liquidbased headspace singledrop microextraction SDME with gas chromatography GC is developed for the determination of chlorobenzene derivatives For the SDME of five chlorobenzene derivatives a 10 μL 1octyl3methylimidazolium hexafluorophosphate microdrop is exposed for 20 min to the headspace of a 15 ml aqueous sample containing 20 w/v NaCl placed in 25 ml vial at 40 °C Then the extractant is directly injected into the injector block of the GC instrument To avoid ionic liquid leaking into the chromatographic column a small glass tube is placed in the injection block Under optimized operation conditions linear relation between peak areas and analyte concentrations up to 15 mg L−1 has been obtained The detection limits range from 01 to 05 μg L−1 for the various analytes The relative standard deviations at 10 μg L−1 range from 77 to 124 and the enrichment factors from 41 to 127 The method is simple and sensitive and does not suffer from the influence of a solvent peak Its applicability is demonstrated by the determination of chlorobenzenes in wastewater samples

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