Abstract: The method of assay of principal constituents of Glucose slurry by r eflectance technicology of Near-infrared spectroscopy has been expounded in thi s thesis. The authors has described the pre-treatment way of sample during the period of setting regression models by partial least-squares(PLS) and the way o f wavelength optimum selection according to normal absorbing peak .It’s test a nd verified that the measuring value of DE and DP has a good correlation betw ee n prediction values with reference values (correlation coefficient is higher th an 0.9), In addition,the results were reliable with coefficient of variation (CV ) of repeatability below 2 percent. Therefore, Near-infrared spectroscopy o f r eflectance technicology could meet practical measurement accuracy as require d fo r principal constituents of Glucose slurry. This study provided a new refer ence method to control starch-sugar procedure for those companies engaged in d eep-process industry.

Key words: dextrose equivalent, distributing polymerization, Near-infrared spe ctroscopy, partial least-squares(PLS), basedata, quantitative model