摘要
建立快速测定啤酒中乙醇含量的近红外光谱法(NIR)。采用傅立叶变换近红外光谱法(FT-NIR),在近红外区域(750～2500nm)利用逐步回归分析的方法测定啤酒中乙醇的含量,并将傅立叶变换近红外光谱对未知样品的预测结果与气相色谱法的测定结果进行比较。结果:选择6个波数点时其最大相关系数为0.994,预测平均相对误差为4.529%,预测误差标准差为0.163。结论:利用近红外光谱检测啤酒中乙醇含量的方法是可行的,可以替代常规的理化分析。
The purpose of this study was to establish a new NIR method for determination of alcohol content in beer. Study methods were as follows: rapid determination of alcohol content in beer by FT-NIR 750～2500 nm with stepwise regression, and the forecast of FT-NIR were compared with the capacity determined by GC. Study results were the following: the maximum correlation coefficient was 0.994, the forecast average relatively error as 4.529 %, and the forecast error standard deviation was 0.163 when six waves were chosen. At last, we could reach a conclusion that the method of NIR, in stead of routine lab analysis, was feasible in the determination of alcohol content in beer. (Tran. by YUE Yang)
出处
《酿酒科技》
北大核心
2005年第4期87-89,共3页
Liquor-Making Science & Technology
