【摘要】 探讨了利用近红外透射光谱法快速测定食醋中总酸和还原糖浓度的可行性，结果表明：总酸和还原糖在近红外光谱８０００～４１００ｃｍ~－１区域中与透射光谱以及与透射光谱的一阶导数光谱具有良好的线性关系，回归分析结果：总酸检测的相对误差＜１．０％，还原糖＜３％（一阶导数光谱），表明该方法可用于总酸和还原糖的快速检测。更多还原

【Abstract】 Hydrogen groups (OH SH CH NH and so on ) can absorb light in NIR spectrum, so it is possible to quickly inspect ethylic acid and reducing sugar in vinegar by using NIRTRS.The study showed that there was good similar linear relation ship between ethylic acid reducing sugar and transmitted spectrum from 8000~4000cm~-1 in NIR Spectrum. Similar result was applicable to the first derivative spectrum of transmitted spectrum. The regression equations were obtained by using fore selection regression to find respective special wave length.By trying 18 samples the results showed in comparison with the standard chemical analysis, the mean relative error (MRE) of ethylic acid was below 1.0% and standard error below 5.7% .The mean relative error of reducing sugar was below 2. 65% and standard error below 0. 101.The results proved that NIRTRS could quickly inspect ethylic acid and reducing sugar.更多还原