摘要
该研究建立了核磁共振氢谱(1H nuclear magnetic resonance,1H NMR)测定白酒酒精度的检测方法。通过1H NMR检测手段,建立了基于白酒中亚甲基与水羟基峰积分比与酒精度的拟合曲线,相关系数为R 2=0.9947;建立了甲基峰位置与乙醇浓度的拟合曲线,相关系数为R 2=0.9918,线性良好。对验证酒样进行测定,拟合得到酒精度比标注酒精度相对偏差<0.02,测试结果满足食品安全法要求。基于核磁共振技术可以检测白酒中的酒精度,操作简单,为企业及检测部门批量检测提供一种快捷方法。
A novel method was developed for measuring alcohol content in Chinese Baijiu using proton nuclear magnetic resonance spectroscopy(1H NMR).In this method,a fitting curve of ethanol concentration vs the integral ratio of methylene and water hydroxyl peaks was established,and the correlation coefficient was R 2=0.9947.At the same time,a working curve was prepared on account of methyl peak position,the correlation coefficient was R 2=0.9918.The linearities of both curves were good.The concentration obtained by 1H NMR was less than 0.02 compared with the labeled value,which met the requirements of current food safety standards.This method exhibits a fairly good analytical performance and saves time,which is easy to operate when dealing with a batch of samples for enterprises and testing departments.
作者
刘恩满
李雪玉
宗绪岩
李丽
王寿峰
LIU Enman;LI Xueyu;ZONG Xuyan;LI Li;WANG Shoufeng(Liquor Making Biological Technology and Application of Key Laboratory of Sichuan Province,Sichuan University of Science&Engineering,Yibin 644000,China;School of Biological Engineering,Sichuan University of Science&Engineering,Yibin 644000,China;School of Chemical Engineering,Sichuan University of Science&Engineering,Zigong 643000,China)
出处
《食品与发酵工业》
CAS
CSCD
北大核心
2021年第12期231-235,共5页
Food and Fermentation Industries
基金
四川省科技厅应用基础研究(2020YJ0404)
酿酒生物技术及应用四川省重点实验室开放基金项目(NJ2018-03)
中国轻工业浓香型白酒固态发酵重点实验室开放基金项目(2018JJ013)
固态酿造关键技术研究四川省院士(专家)工作站基金项目(GY2016-04)。
关键词
核磁共振氢谱
白酒
酒精度
检测方法
^(1)H NMR
Chinese Baijiu
alcohol content
detection method
作者简介
第一作者:刘恩满,硕士研究生;通讯作者:王寿峰,助理研究员,E-mail:shoufeng.wang@163.com。
