Study on Online Detection Modeling Parameters of Jujube Internal Quality of Southern Xinjiang with Near Infrared Spectrometric Techniques
LUO Hua-ping1, 2, LU Qi-peng2*，DING Hai-quan2, GAO Hong-zhi2，GUO Ling3
1. College of Mechanic and Electrical Engineering, Tarim University, Alar 843300，China 2. Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, State Key Laboratory of Applied Optics，Changchun 130033, China 3. College of Plant Science，Tarim University，Alar 843300, China
Abstract：To establish the on-line near infrared spectral correction model for the jujube quality of Southern Xinjiang, the main influence factors of online testing results were analyzed, and the corresponding parameters were studied. First of all, the collecting conditions of different jujube were set, such as measurement condition, spectral region, and the parameters of the apparatus. With near infrared spectrometer and self-designed jujube batch collecting attachment, the quality spectrum of jujube was obtained, and combining spectral preprocessing and detection precision, condition parameters were selected. Secondly, through PLS spectrum correction with different modeling parameters and two-dimensional correlation spectroscopy analysis, Brix characteristic spectral parameters were selected. The results showed that with sugar degree central wavelength 9 116, 9 418 and 10 500 cm-1, acquisition resolution 16 cm-1, and scan number 8, the sugar degree relative error was 8%～10%, the size of single grain jujube spectra was reduced to 1/10 of the original, and the time was reduced to 3 seconds. It was concluded that with the experimental parameters, the spectra were compressed, a primary online correction model was established, and the jujube quality on-line detection with near infrared spectroscopy was basically realized.
Key words：The jujube of Southern Xinjiang;Near infrared spectrum;On-line detection;Model parameter
罗华平1, 2，卢启鹏2*，丁海泉2，高洪智2，郭 玲3 . 南疆红枣品质近红外光谱在线模型参数的实验研究[J]. 光谱学与光谱分析, 2012, 32(05): 1225-1229.
LUO Hua-ping1, 2, LU Qi-peng2*，DING Hai-quan2, GAO Hong-zhi2，GUO Ling3 . Study on Online Detection Modeling Parameters of Jujube Internal Quality of Southern Xinjiang with Near Infrared Spectrometric Techniques. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2012, 32(05): 1225-1229.
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