中红外模型快速检测白酒基础酒中总酯的含量

Rapid Determination of Total Esters in Baijiu Basic Wine by Mid Infrared Model

建立了一种快速检测白酒基础酒总酯的检测方法。根据GB/T 10345-2007中总酯含量检测方法为参比方法,采用红外分析技术结合偏最小二乘法,分别建立了基础酒总酯的中红外定量分析模型和近红外定量分析模型。对比这两个定量分析模型:中红外定量分析模型的效果更显著,模型校正集交互验证均方根误差(RMSEC)为0.123,校正集决定系数R2C为0.9951;样品验证集均方根误差(RMSEP)为0.134,验证集相关系数R2P为0.9914;该方法预测值与理化值的绝对误差为-0.31~0.50,相对误差-5.91%~9.62%。

A method for rapid detection of total esters in basic wine was established.Using GB/T 10345-2007 to determine the content of total esters as a reference method, using infrared analysis technology combined with partial least squares method,respectively established the mid-infrared quantitative analysis model and near-infrared quantitative analysis mode. Comparing the two quantitative analysis models: the results show that the mid-infrared quantitative analysis model is more excellent, the root mean square error of cross validation of the calibration set is 0.123, the correlation coefficient R2 Cof the calibration set is0.9951, the root mean square error of the validation set is 0.134, the correlation coefficient R2 Pof the validation set is 0.9914. The absolute error is in the range of-0.31~0.50, and the relative error is in the range of-5.91%~9.62%.