基于红外光谱结合角度度量法同时检测环氧大豆油理化指标  

Simultaneous Detection of Physical and Chemical Indicators of Epoxidized Soybean Oil Based on Infrared Spectroscopy Combined with Angle Measurement

作　　者：冯晓倩 粟晖[1,2] 姚志湘 Feng Xiaoqian;Su Hui;Yao Zhixiang(College of Biological and Chemical Engineering,Guangxi University of Science and Technology,Liuzhou 545006;State Key Laboratory of Green Processing of Sugar Resources in Guangxi Province,Liuzhou 545006)

机构地区：[1]广西科技大学生物与化学工程学院,柳州545006 [2]广西糖资源绿色加工重点实验室,柳州545006

出　　处：《中国粮油学报》2024年第12期188-194,共7页Journal of the Chinese Cereals and Oils Association

摘　　要：采用导数红外光谱结合角度度量法(VAPLS),建立了对环氧大豆油环氧值、酸值和折光率等理化指标的同时快速测定模型。实验结果表明,经过二阶导数预处理的光谱,结合角度度量法(VAPLS)在全波段上建立的模型效果最为理想。环氧值、酸值和折光率的模型相关系数(R_(c)^(2))分别为0.9997、0.9958、0.9998,显示出模型的预测能力较强;校正均方差(RMSEC)分别为0.0327、0.0095、0.0001;预测均方差(RMSEP)分别为0.1503、0.0122、0.0006,模型具有较好的预测精度和稳定性;验证集的相对误差环氧值为0.30%~5.06%、酸值为1.05%~4.88%、折光率为0.00%~0.06%。Infrared spectroscopy combined with angle measurement(VAPLS)and partial least squares(PLS)was used to establish a model for the physicochemical indexes of epoxy value,acid value and refractive rate of epoxy soybean oil.The experimental results indicated that the predicted value of the built model had a good correlation with the true value,and the established method could detect the physicochemical index of epoxy soybean oil quickly.Among,spectra were preprocessed by the second derivative,the combined angle measurement(VAPLS)was the best model on the full band,the model correlation coefficients for epoxy,acid and refraction were 0.9997,0.9958,0.9998;the ted mean variance(RMSEC)was 0.0327,0.0095,0.0001;the predicted mean variance(RM SEP)was 0.1503,0.0122,0.0006,The relative error of the epoxy value verification set was 0.30%-5.06%;The relative error of the acid value was 1.05%-4.88%;the relative error of the refractive ratio was 0.00%-0.06%.

关 键 词：环氧大豆油 红外光谱 角度度量(VAPLS) 快速检测 

分 类 号：O657.33[理学—分析化学]