Measurement of sugar content in Fuji apples by FT-NIR spectroscopy

作     者：刘燕德 应义斌 

作者机构：CollegeofBiosystemsEngineering＆FoodScienceZhejiangUniversityHangzhou310029China 

出 版 物：《Journal of Zhejiang University Science》 (浙江大学学报（自然科学英文版）)

年 卷 期：2004年第5卷第6期

页      面：651-655页

核心收录：

学科分类：0832[工学-食品科学与工程（可授工学、农学学位）] 08[工学] 09[农学] 0903[农学-农业资源与环境] 083203[工学-农产品加工及贮藏工程] 

基　　金：Project (No. 30270763) supported by the National Natural Science Foundation of China 

主　　题：FT-NIR spectroscopy Nondestructive measurement Sugar content Fuji apples Partial least squares analysis 

摘      要：To evaluate the potential of FT-NIR spectroscopy and the influence of the distance between the light source/detection probe and the fruit for measuring the sugar content (SC) of Fuji apples, diffuse reflectance spectra were measured in the spectral range from 12500 to 4000 cm^-1 at 0 mm, 2 mm, 4 mm and 6 mm distances. Four calibration models at four distances were established between diffused reflectance spectra and sugar content by partial least squares (PLS) analysis. The correlation coefficients (R) of calibrations ranged from 0.982 to 0.997 with SEC values from 0.138 to 0.453 and the SECV values from 0.74 to 1.58. The best model of original spectra at 0 mm distance yielded high correlation determination of 0.918, a SEC of 0.092, and a SEP of 0.773. The results showed that different light/detection probe-fruit distances influence the apple reflective spectra and SC predictions.