期刊
TALANTA
卷 79, 期 3, 页码 695-699出版社
ELSEVIER
DOI: 10.1016/j.talanta.2009.04.068
关键词
Thymol; Carvacrol; Hydrodistillation; Headspace solvent microextraction; Response surface methodology; Thymus transcaspicus
资金
- Research Council of Shahid Beheshti University
In this paper multivariate response surface methodology (RSM) has been used for the optimization of hydrodistillation-headspace solvent microextraction (HD-HSME) of thymol and carvacrol in Thymus transcaspicus. Quantitative determination of compounds of interest was performed simultaneously using gas chromatography coupled with flame ionization detector (GC-FID). Parameters affecting the extraction efficiency were assessed and the optimized values were 5 min, 2 mu L and 3 min for the extraction time, micro-drop volume and cooling time after extraction, respectively. The amounts of analyte extracted increased with plant weight. The calibration curves were linear in the ranges of 6.25-81.25 and 1.25-87.50 mg L-1 for thymol and carvacrol, respectively. Limit of detection (LOD) for thymol and carvacrol was 1.87 and 0.23 mg L-1, respectively. Within-day and between-day precisions for both analytes were calculated in three different concentrations and recoveries obtained were in the range of 89-101% and 95-116% for thymol and carvacrol, respectively. (C) 2009 Elsevier B.V. All rights reserved.
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