测试部位对猕猴桃近红外光谱响应特性的影响  

Influences of Test Locations on Sugar Content Prediction of Kiwifruit with Near-infrared Diffuse Reflectance Technique

作　　者：陈香维[1] 杨公明[2] 

机构地区：[1]西北农林科技大学食品科学与工程学院,陕西杨凌712100 [2]华南农业大学食品学院,广州510642

出　　处：《农业机械学报》2009年第1期124-128,共5页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家"十一五"科技支撑计划资助项目(2006BAK02A18;2006BAK02A24;2006BAK02A05);农业部跨越计划资助项目(2005-4);陕西省重大科技专项资助项目(2006KZ09-G1;2008ZDKG-04)

摘　　要：应用近红外光谱漫反射技术,采集猕猴桃赤道附近不同测试部位的近红外光谱,对不同测试部位的平均吸光度和噪声进行差异性分析,对不同测试部位的近红外光谱波峰位置、不同波长处的吸光度以及近红外光谱糖度定量分析模型的预测精度进行了单因素方差分析。同一猕猴桃在赤道附近的不同测试部位,其近红外光谱平均吸光度及噪声的波动性较小,波峰位置差异不显著;同一猕猴桃在相同的波峰位置处,不同测试部位的吸光度差异不显著。越是靠近长波近红外区,吸光度的相对标准偏差越大,但是从总体上看,不同波长位置、不同测试部位吸光度的离散度都不大;用不同测试部位的光谱所建立的糖度定量分析模型检测精度差异不显著。猕猴桃赤道附近不同测试部位的近红外光谱都可以用来分析整个猕猴桃的品质。To find reasonable position on the kiwifruit to collect near-infrared spectrum information for quality evaluation, near-infrared spectrum was collected at different locations near the equator on the kiwifruit applying the near-infrared spectrum diffuse reflection technology. Difference analysis on the average absorbance and the noise of the spectrum on the tested locations was carried out. The single factor variance analysis was conducted to the near-infrared spectrum wave ridge position and the absorbance at different locations, as well as the prediction precision of the Brix quantitative analysis model. The results showed that the variety for the average absorbance and noise for the spectrum at different locations aroun^t the equator on the same kiwifruit was low, and the wave ridge position difference was not remarkable. The difference of absorbance was not remarkable at different locations in the same wave ridge position for the same kiwifruit. The relatively standard deviation of the absorbance was greater when the wavelength was longer in the near infrared area. However, the degree of scatter of data was not high at all wavelength at different locations in the same wave ridge position. The deference for the Brix prediction models built by spectrum data at different locations was not remarkable. It is concluded that the near-infrared spectrum information collected at different locations around the equator of the kiwifruit can be used for quality evaluation for the entire fruit without high difference.

关 键 词：猕猴桃 糖度 近红外光谱 无损检测 测试部位 

分 类 号：TN219[电子电信—物理电子学]