Abstract:

In order to measuring alcohol concentration in distilled spirit accurately and quickly,a calibration model was established based on Fourier Transform Near Infrared Spectroscopy with partial least square.According to the selected spectra ranges of 5731.40~5897.25、5901.11~ 6063.10、8327.12~8423.54cm-1and standard nomral variate processing method,the rank was five.the correlation coefficient(R) of the model and the root mean square error of cross validation (RMSECV) are 0.99916,0.263 respectively．Then the model was tested and evaluated and the result showed the R of the test set and the root mean square error of prediction(RMSEP) are 0.99,0.453 respectively. the method has been applied to quick determination of alcohol concentration with satisfactory results in the distilled spirit industry.