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https://scholarbank.nus.edu.sg/handle/10635/52705
Title: | Liquid-Phase Microextraction in a Single Drop of Organic Solvent by Using a Conventional Microsyringe | Authors: | He, Y. Lee, H.K. |
Issue Date: | 15-Nov-1997 | Citation: | 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 | URI: | http://scholarbank.nus.edu.sg/handle/10635/52705 | ISSN: | 00032700 |
Appears in Collections: | Staff Publications |
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