[Feasibility of using ethanol liquor NIRS model to predict ethanol in vinous ferment liquid].

The robust NIRS model must be developed by the representative samples and precise chemical values, taking much of work. To reduce the calibration work, the present paper explored the NIRS model developed using ethanol liquor to predict ethanol of the wine samples. The authors used the gene arithmetic (GA) method to select the calibration region (2 245-2 320 nm) which has relatively high correlation with the consistency of ethanol in ethanol liquor and has little interfere by other components in wine.

[Detection of tofu hardness by near infrared spectroscopy].

The possibility of determination of tofu hardness by near infrared spectroscopy (NIR, 833-2500 nm) was studied. The influences of water content and protein content on the spectra were discussed, in order to detect the hardness. The models of Tofu hardness were calibrated by partial least squares regression (PLS) after eliminating outline, spectra pretreatment, and wavelength optimization (r = 0.