https://scholars.lib.ntu.edu.tw/handle/123456789/572723
標題: | Simultaneous Analysis of the Stable Carbon Isotope Ratios of Acetoin and Acetic Acid by GC-C-IRMS for Adulteration Detection in Brewed Rice Vinegar Products | 作者: | Fang C.-J You H.-C Huang Z.-L Hsu C.-L Tsai C.-F Lin Y.-T Kao Y.-M Tseng S.-H Wang D.-Y NAN-WEI SU |
關鍵字: | Blending; Carbon; Gas chromatography; Isotopes; Mass spectrometry; pH; Acetoin; Blending ratio; Confidence interval; Detection curves; Gas chromatography combustion-isotope ratio mass spectrometry; Simultaneous analysis; Stable carbon isotope ratio; Stable carbon isotopes; Acetic acid | 公開日期: | 2020 | 卷: | 68 | 期: | 48 | 起(迄)頁: | 14252-14260 | 來源出版物: | Journal of Agricultural and Food Chemistry | 摘要: | In this study, we developed a method to simultaneously measure the stable carbon isotope ratio for acetic acid (δ13Cacetic acid) and acetoin (δ13Cacetoin) in rice vinegar by gas chromatography-combustion-isotope ratio mass spectrometry. The method showed good precision and accuracy. With this method, data from 16 brewed rice vinegars and 10 acetic acid samples were used to evaluate the feasibility of adulteration detection. On the basis that all δ13Cacetoin values of brewed rice vinegars are nearly constant, a characteristic pattern of the stable carbon isotope in rice vinegar was built with the 95% confidence intervals for δ13Cacetic acid (-26.97 to -25.38?), δ13Cacetoin (-28.14 to -27.09?), and Δδ13C (0.61 to 2.27?). An adulteration detection curve of Δδ13C was proposed based on the results of vinegar and acetic acid samples and confirmed by vinegar spiked with different amounts of acetic acid. This method could be useful in estimating the blending ratio of adulterated rice vinegar products. Products containing more than 10% of synthetic acetic acid could be possibly identified. ? |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85097925614&doi=10.1021%2facs.jafc.0c05674&partnerID=40&md5=134e7cdfebdd2c16ef6eb6bd4e40e0b0 https://scholars.lib.ntu.edu.tw/handle/123456789/572723 |
ISSN: | 218561 | DOI: | 10.1021/acs.jafc.0c05674 |
顯示於: | 農業化學系 |
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