Quantitative Analysis of Ethyl Acetate,Ethyl Lactate and Ethyl Caproate
Ethyl acetate and ethyl lactate are the main aromas in Laobaigan Baijiu,and the content of ethyl caproate is very low.In the application of GB/T10345-2022《Liquor Analysis Method》,the concentration of ethyl caproate standard solution is reduced,so that the concentration range of standard curve can cover more sample concentration.The contents of ethyl acetate,ethyl lactate and ethyl caproate in laobaigan Baijiu were analyzed by standard curve method and correction factor method.In the experimental process,the correction factor quantitative method is simple and quick to operate,but the disadvantage is that the relative error is large when the calibration point is far away from the single point or when the content is small.The correction factor should be determined according to the mixing standard,and the correction factor should be timely adjusted according to the state of the instrument,and the accuracy of the content of each component of the mixing standard should be ensured.The standard curve method has good accuracy in all concentration ranges of the test,but the disadvantage is that ethyl acetate,ethyl caproate and ethyl lactate are very volatile,easy to have errors in weighing,and there are strict requirements on ambient temperature and operation when preparing the standard stock solution.In the detection of Laobai dry wine,the accuracy of standard curve quantitative method is higher.
gas chromatographyEthyl acetateEthyl lactateEthyl caproatestandard curve methodcorrection factor methodaccuracy
万方数据
维普
