摘要
稳定同位素技术在食品真实鉴别中具有重要应用价值,本文借助稳定碳同位素技术研究了苹果醋饮料的掺假检测方法。基于苹果的糖中碳同位素δ13CVPDB数据,提出了苹果醋饮料的乙酸δ13CVPDB值范围。研究表明,苹果具有典型的C3植物的碳同位素分布特征,苹果醋中掺入玉米原料生产的冰乙酸后乙酸δ13CVPDB值与冰乙酸掺入量呈线性正相关关系。采集了20个市售苹果醋饮料,检出6个掺有玉米原料冰乙酸的阳性样品。该技术可用于苹果醋的真假鉴别,填补了稳定同位素技术在我国果醋饮料真伪鉴别中的应用空白,对实现我国果醋标准与国际接轨、促进果醋的进出口和保护消费者合法权益具有重要意义。
Stable isotopic techniques play am important role in food authenticity evaluation. In this paper, the stable carbon isotope technologies (δ^13CVPDB) were used to detect the adulteration of apple vinegar. On the based of δ^13CVPDB character of sugar of apple, the distribution of δ^13CVPDB value of acetic acid of apple vinegar was put forward. Results showed that, apple tree was a classic C3 plant with sugar δ^13CVPDB value ranges from -27,11‰--23.75‰ for the limited samples, and the δ^13CVPDB value of acetic acid showed a positive correlation while pure acetic acid derived from fermentation of corn. 20 commercial apple vinegar samples were collected, and δ^13CVPDB value of acetic acid indicated that 6 samples were adulterated with the illegal addition of corn acetic acid. This paper demonstrated a new method to discriminate real apple vinegar from fraud products. This finding and its possible application is a great significance for upgrading the technical level of China National Standard of vinegar and affiliate the imports and exports of vinegar.
出处
《饮料工业》
2016年第4期14-17,共4页
Beverage Industry
基金
科技部国际合作项目(2015DFA31720)
国家自然科学基金(31601553)
关键词
碳同位素
苹果醋
乙酸
玉米
掺假检测
stable carbon isotope ratio (δ^13C)
apple vinegar
acetic acid
corn
detection of adulteration