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|Title:||Liquid-Phase Microextraction in a Single Drop of Organic Solvent by Using a Conventional Microsyringe|
|Authors:||He, Y. |
|Source:||He, Y.,Lee, H.K. (1997-11-15). Liquid-Phase Microextraction in a Single Drop of Organic Solvent by Using a Conventional Microsyringe. Analytical Chemistry 69 (22) : 4634-4640. ScholarBank@NUS Repository.|
|Abstract:||Two modes of liquid-phase microextraction (LPME) were developed for capillary gas chromatography. Both methodologies, i.e., static LPME and dynamic LPME, involve the use of very small amounts of organic solvent (<2 μL) in a conventional microsyringe. The performance of the two techniques is demonstrated in the determination of two chlorobenzenes extracted into a single drop of toluene by the use of a 10-μL syringe. Static LPME provided some enrichment (∼12-fold), good reproducibility (9.7%), and simplicity but suffered relatively long extraction time (15 min). Dynamic LPME provided higher (∼27-fold) enrichment within much shorter extraction time (∼3 min), and relatively poorer precision (12.8%), primarily due to repeated manual manipulation. Both methods allow the direct transfer of extracted analytes into a gas chromatograph.|
|Source Title:||Analytical Chemistry|
|Appears in Collections:||Staff Publications|
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