Journal
CHINESE CHEMICAL LETTERS
Volume 18, Issue 3, Pages 316-318Publisher
CHINESE CHEMICAL SOCIETY
DOI: 10.1016/j.cclet.2007.01.032
Keywords
hollow fiber-based liquid-phase microextraction; sweeping; MEKC; Strychnos alkaloids; urine
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A new method for the enrichment of Strychnos alkaloids in biological samples via liquid-phase microextraction (LPME) based on porous polypropylene hollow fibers in combination with on-line sweeping in micellar electrokinetic chromatography was developed. The calibration curve was linear over the range of 20-200 ng mL(-1) for both strychnine and brucine in human urine sample. The detection limits (S/N = 3:1.) for strychnine and brucine were 1 ng mL(-1) and 2 ng mL(-1), respectively. The LPME-sweeping method has been successfully applied to the analysis of strychnine and brucine in real urine samples. (c) 2007 Zhi Wang. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
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