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当前位置: 首页 > 文章 > 基于近红外光谱分析法的奶粉品质快速检测 农业机械学报 2009,40 (7) 149-152+137
Position: Home > Articles > Quick Determination Method of Milk Powder Quality by Near-infrared Spectroscopy Transactions of the Chinese Society for Agricultural Machinery 2009,40 (7) 149-152+137

基于近红外光谱分析法的奶粉品质快速检测

作  者：
颜辉;陈斌;朱文静
单  位：
江苏大学食品与生物工程学院
关键词：
奶粉;品质检测;近红外光谱;小波消噪;波长选择
摘  要：
选择11个品牌的10多种配方奶粉,共80个样品,使用PDA型近红外光谱仪采集奶粉漫反射光谱,波长范围1089~2219 nm。对光谱进行了SNV、软阈小波消噪及一阶微分预处理,通过比较主成分在不同波长上的权重分布,选择不同波段建立校正模型和进行预测精度分析。结果表明,奶粉的蛋白质和脂肪的近红外光谱信息主要分布于1100~1400 nm和1800~2200 nm波段内,采用小波消除原始光谱的噪声能提高校正模型的稳定性和预测精度,可以利用PDA型近红外光谱快速检测多品牌、多类型配方奶粉中蛋白、脂肪含量。
译  名：
Quick Determination Method of Milk Powder Quality by Near-infrared Spectroscopy
作  者：
Yan Hui1,2 Chen Bin1 Zhu Wenjing1(1.College of Food and Biological Engineering,Jiangsu University,Zhenjiang 212013,China 2.School of Biological and Environmental Engineering,Jiangsu University of Science and Technology,Zhenjiang 212018,China)
关键词：
Milk power,Quality detection,Near-infrared spectroscopy,Wavelet denoise,Wavelength selection
摘  要：
Eighty milk powder samples which represented over 10 formulae of ingredients from 11 commercial brands were collected and a PDA type near-infrared spectrometer was used to obtain their diffusion reflectance spectra(1 nm resolution) within the wavelengths of 1 089～2 219 nm.The obtained spectra were pre-treated with standard normal variate correction(SNV),wavelet denoise and 1-order differentiation method.Through comparing the weighted distribution of the milk powder's five principal ingredients at various wavelengths,different ranges of wavelength were selected to establish calibration models and to analyze their prediction accuracy.The results showed that spectrum information of milk powder's protein and fat composition was mainly distributed within the wavelengths of 1 100～1 400 nm and 1 800～2 200 nm.It was shown that wavelet denoise was an excellent method for pre-processing spectra,which could significantly enhance the stability of calibration models and prediction accuracy.The present study reveals that it is feasible to determine the concentrations of protein and fat in milk powder of various origins with a PDA type near-infrared spectrometer.

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