透射型近红外光谱法检测稻谷脂肪酸值  

Determination of fatty acid value of rice by transmission near infrared spectroscopy

作　　者：于加乾 王小庆 杨军 邓德安 徐阳 郑鹏宇 Yu Jiaqian;Wang Xiaoqing;Yang Jun;Deng De'an;Xu Yang;Zheng Pengyu(Yibin Grain and Oil Quality Monitoring Station,Yibin,Sichuan 644000;China Grain Reserves(Sichuan)Quality Inspection Center Co.,Ltd.,Chengdu,Sichuan,610052;Yibin Yanfrze River Source Wine Co.,Ltd.,Yibin,Sichuan 644002)

机构地区：[1]宜宾市粮油质量监测站,四川宜宾644000 [2]中储粮(四川)质检中心有限公司,四川成都610052 [3]宜宾长江源酒业有限责任公司,四川宜宾644002

出　　处：《粮食科技与经济》2024年第4期86-90,共5页Food Science And Technology And Economy

摘　　要：稻谷储存品质关系到国计民生,为了快速、批量检测稻谷中脂肪酸值,研究提出基于透射型近红外光谱法测定稻谷中脂肪酸值的检测方法。稻谷样品预处理按照国标要求砻谷脱壳,近红外采集脱壳后糙米光谱,结合国标滴定值建立预测模型。采用一阶导数、SG平滑(平滑点数9,次数3)及SNV对光谱数据进行预处理,提升预测模型准确性和稳定性,得到的最佳模型的R、RMSECV、RMSEP分别为0.93、1.94、1.79。通过对梯度浓度的验证及样品的多天连续验证,确定建立的模型预测值与国标测定值的相对偏差为0.85%,结果表明,透射型近红外光谱法能够较为准确稳定地检测稻谷脂肪酸值。The storage quality of paddy is related to the national economy and people's livelihood.To detect the paddy fatty acid value rapidly and vastly,this study proposed a detection method based on transmission near infrared spectroscopy to detect the paddy fatty acid value.The paddy samples were pretreated for decladding in accordance with the requirements of national standard,and the spectrum of brown rice after husking was collected by near infrared,and the prediction model was established by combining with the titration value of national standard.The first derivative,SG smoothing(smoothing point was 9,number was 3)and SNV were used to preprocess the spectral data to improve the accuracy and stability of the prediction model.The R,RMSECV and RMSEP of the best model were 0.93,1.94 and 1.79,respectively.Through the multi-day continuous verification of the gradient concentration verification set samples,the relative deviation between the established model predicted value and the national standard value was determined to be 0.85%.The results showed that the near infrared spectral transmission could accurately and stably detect the paddy fatty acid value.

关 键 词：稻谷 脂肪酸值 近红外光谱 透射 

分 类 号：TS210.7[轻工技术与工程—粮食、油脂及植物蛋白工程]