Temperature Compensation for Portable Vis/NIR Spectrometer Measurement of Apple Fruit Soluble Solids Contents
文献类型： 外文期刊
作者： Wang Jia-hua 2 ; Qi Shu-ye 3 ; Tang Zhi-hui 4 ; Jia Shou-xing 4 ; Li Yong-yu 1 ;
作者机构： 1.China Agr Univ, Coll Engn, Beijing 100083, Peoples R China
2.Xuchang Univ, Sch Food Sci & Engn, Xuchang 461000, Peoples R China
3.China Agr Univ, Coll Food Sci & Nutr Engn, Beijing 100083, Peoples R China
4.Xinjiang Acad Agr & Reclamat Sci, Inst Machinery Equipment, Shihezi 832000, Peoples R China
关键词： Near infrared spectroscopy;Apple;Soluble solids content;Temperature;Calibration model
期刊名称：SPECTROSCOPY AND SPECTRAL ANALYSIS （ 影响因子：0.589； 五年影响因子：0.504 ）
ISSN： 1000-0593
年卷期： 2012 年 32 卷 5 期
页码：
收录情况： SCI
摘要： Visible (Vis)/near infrared (NIR) spectroscopy has been used successfully to measure soluble solids content (SSC) in fruit. However, for practical implementation, the NIR technique needs to be able to compensate for fruit temperature fluctuations, as it was observed that the sample temperature affects the NW spectrum. A portable Vis / NIR spectrometer was used to collect diffused transmittance spectra of apples at different temperatures (0 similar to 30 degrees C). The spectral data of apple at 20 degrees C was used to develop a norm partial least squares (PLS) model. Slope/ bias technique was found to well suits to control the accuracy of the calibration model for SSC concerning temperature fluctuations. The correctional PLS models were used to predict the SSC of apple at 0, 10 and 30 degrees C, respectively. The correctional method was found to perform well with Q values of 0.810, 0.822 and 0.802, respectively. When no precautions are taken, the Q value on the SSC may be as small as 0.25 similar to 0.680. The results obtained highlight the potential of portable Vis/NIR instruments for assessing internal quality of fruits on site under varying weather conditions.
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