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机构地区:[1]广州禾信仪器股份有限公司,广东广州510530 [2]暨南大学质谱仪器与大气环境研究所,广东广州510632 [3]广东省大气污染在线源解析系统工程技术研究中心,广东广州510632
出 处:《食品科学》2016年第24期180-184,共5页Food Science
基 金:国家高技术研究发展计划(863计划)项目(2014AA06A501);广东省联合基金项目(U1201232);2016年国家重点研发计划试点专项(2016YFC0201002)
摘 要:采用在线质谱法,在无需样品预处理的条件下,建立快速检测酒中乙酸乙酯、丁酸乙酯、乳酸乙酯、戊酸乙酯、己酸乙酯5种常见乙酯的方法。5种乙酯在0.5~20 mg/L内线性关系良好(R^2>0.99),2个加标水平(0.5、5 mg/L)的回收率为81.1%~99.7%,相对标准偏差为4.7%~9.4%,检出限为24~312μg/L。对市场上消费的蒸馏酒(中国白酒、白兰地、金酒及威士忌)进行检测分析,同种类蒸馏酒检出的主要成分及其比例基本一致,中国白酒、威士忌和白兰地均不同程度地检出乙酯。同时,结合主成分分析可对不同品种的蒸馏酒进行较好的区分。A rapid method was developed for the determination of 5 common ethyl esters,ethyl acetate,ethyl butyrate,ethyl lactate,ethyl valerate and ethyl caproate,in liquor without any sample pretreatment using on-line mass spectrometry.Reasonable linearity was achieved for all the analytes over the range of 0.5–20 mg/L with correlation coefficients(R^2) greater than 0.99.The recoveries for five ethyl esters at two spiked levels were in the range from 81.1% to 99.7% with relative standard deviations(RSDs) of 4.7%-9.4%.The limits of detection(LODs) of the method ranged from 24 to 312 μg/L.Under optimized conditions,four kinds of distilled spirits marketed in China were analyzed,such as Chinese liquor,brandy,Dry Gin and whiskies.The main ester components and their contents in the same kind of distilled spirit were basically the same while ethyl esters were determined at different levels in Chinese liquor,brandy and whiskies.Meanwhile,the four kinds of distilled spirits could be distinguished accurately using principal component analysis.
关 键 词:在线质谱法 飞行时间质谱仪 酒 蒸馏酒 乙酯 主成分分析
分 类 号:TS262[轻工技术与工程—发酵工程]
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