牛乳清粉掺伪羊乳粉的近红外光谱法快速无损检测  

Near Infrared Spectroscopy Combined with Support Vector Regression Applied for Rapid and Nondestructive Detection of Adulterate Goat Milk Powder

作　　者：邹婷婷[1] 王莹 宋焕禄[1] Zou Tingting Wang Ying Song Huanlu(Beijing Advanced Innovation Center for Food Nutrition and Human Health/Beijing Higher Institution Engineering Research Center of Food Additives and Ingredients, Beijing Technology ＆ Business University, Beijing 100048 Jilin Institute for Food Control, Changchun 130022)

机构地区：[1]北京食品营养与人类健康高精尖创新中心/食品添加剂与配料北京高校工程研究中心北京工商大学,北京100048 [2]吉林省食品检验所,长春130022

出　　处：《中国食品学报》2017年第8期261-267,共7页Journal of Chinese Institute Of Food Science and Technology

摘　　要：为快速无损检测掺伪羊乳粉中牛乳清粉的含量,采用近红外光谱法(NIR)结合ν-支持向量回归(ν-SVR)检测197个掺伪牛乳清粉的羊乳粉,并与偏最小二乘法(PLS)对比,光谱经平滑、标准变量变换及导数预处理。随机选取132个样本作为校正集建立模型,其余65个样本作为测试集,评估模型性能。结果显示:校正集最优模型为标准变量变换、Savitzky-Golay平滑和二阶导预处理ν-SVR模型,其交叉验证误差均方根(RMSECV)为0.586,交叉验证相关系数(RCV)达到0.9947。预测集验证结果ν-SVR法比PLS法更优,ν-SVR模型预测值与真实值R达到0.9958,RMSEP为0.526。试验结果表明NIR结合ν-SVR模型可用于掺伪羊乳粉中牛乳清粉的快速无损检测,而且操作简便,可为实际应用提供参考。To rapidly and nondestructively detect the content of milk whey powder in adulterate goat milk powder,near infrared spectroscopy combined with ν-support vector regression is applied in the study on 197 adulterate goat milk powder and the results are compared with least-squares regression method. The spectrum is pretreated with smoothing,standard variable transformation and derivative. 132 samples are randomly selected as the calibration set for modeling and the remaining 65 samples as the test set for evaluation of the model performance. Results show that the optimal model of calibration set is ν-SVR model pretreated with standard variable transformation, Savitzky-Golay smoothing and second derivative. Cross validation error root mean square（RMSECV） is 0.586 and cross validation correlation coefficient（RCV）is up to 0.9947. For prediction set validation results, ν-SVR method is better than PLS method. Correlation coefficient ofν-SVR model prediction value and real value is up to 0.9958 and RMSEP is 0.526. Results indicate that NIR combined with ν-SVR model can be used to detect the content of milk whey powder in adulterate goat milk powder. It is rapid,non-destructive and easy to operate, which provides a reference for practical application.

关 键 词：近红外光谱技术 羊乳粉 ν-支持向量回归 牛乳清粉 定量分析 

分 类 号：O657.33[理学—分析化学] TS252.7[理学—化学]