期刊
FOOD CHEMISTRY
卷 286, 期 -, 页码 141-145出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2019.01.159
关键词
Tetramethylpyrazine; Dispersive liquid-liquid microextraction; Vinegar; High-performance liquid chromatography
资金
- 13th Five Years Key Programs for Science and Technology Development of China [2017YFD0400103, 2018YFC1406806]
The concentration of tetramethylpyrazine (TMP) in vinegar is an active indicator of vinegar quality. Dispersive liquid-liquid microextraction (DLLME) was first applied to vinegar as a clean-up pre-treatment for the rapid (5 min) determination of TMP by high-pressure liquid chromatography with ultraviolet detection (HPLC-UV), and may serve as an alternative to solid-phase extraction (SPE) or solid-phase microextraction (SPME). High sensitivity of HPLC for TMP determination was obtained using the DLLME pretreatment, with a limit of detection (LOD) of 0.001 mg L-1 and limit of quantification (LOQ) of 0.005 mg L-1. The developed method exhibited excellent linearity in the concentration range of 0.050-80.000 mg L-1, with a correlation coefficient R-2 > 0.999. Furthermore, the percentage recovery of TMP in vinegar using the developed method was within the range 97.97-105.24%. Therefore, DLLME coupled with HPLC-UV is a sensitive and promising method for vinegar clean-up and TMP assay.
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