近红外光谱法快速测定动植物油脂中游离脂肪酸含量  

Rapid Determination of Free Fatty Acid in Animal and Vegetable Oil and Fat by Near-Infrared Spectrometry

作　　者：吴晓红[1] 程欲晓[1] 杨勇[1] 周宇艳[1] 马腾洲[1] 张琳[1] 

机构地区：[1]上海出入境检验检疫局,上海200135

出　　处：《理化检验（化学分册）》2013年第9期1025-1028,共4页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：提出了近红外光谱法快速测定动植物油脂中游离脂肪酸含量的方法。采用化学方法获得动植物油脂中游离脂肪酸含量的基本参照数据,并通过近红外光谱分析结果结合偏最小二乘回归算法,建立牛羊油、棕榈仁油、蓖麻油中游离脂肪酸含量的校正模型,其决定系数分别为0.9979,0.9974,0.9767,验证均方偏差分别为0.190%,0.0834%,0.0592%。方法用于动植物油脂样品的分析,所得预测值与化学法测定结果相符,测定值的相对标准偏差(n=10)均小于6%。Near-infrared spectrometry was applied to the rapid determination of free fatty acid in animal and vegetable oil and fat. The basic reference values were obtained by chemical method. Combining the results obtained by near-infrared spectrometry with partial least squares regression method, the calibration models of tallow, palm kernel oil and castor oil were established with coefficients of determination of 0. 997 9, 0. 997 4 and 0. 976 7, and mean square deviations of calibration of 0. 190%, 0. 083 4% and 0. 059 2% respectively. The proposed method was applied to the analysis of samples of animal and vegetable oil and fat, giving results in consistency with the values obtained by chemical method with RSD＇s （n=10） less than 6%.

关 键 词：近红外光谱法 偏最小二乘回归法 游离脂肪酸 动植物油脂 

分 类 号：O657.33[理学—分析化学]