ATR-FTIR法快速检测牛油火锅底料中的固体石蜡  

Rapid determination of solid paraffin in butter hot pot seasoning by ATR-FTIR

作　　者：唐怡 粟晖[1,2] 姚志湘[1,2] TANG Yi;SU Hui;YAO Zhi-xiang(College of Biological and Chemical Engineering,Guangxi University of Science and Technology,Liuzhou 545006,Guangxi,China;Guangxi Key Laboratory of Green Processing of Sugar Resources,Guangxi University of Science and Technology,Liuzhou 545006,Guangxi,China)

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

出　　处：《粮食与油脂》2022年第9期145-148,共4页Cereals & Oils

基　　金：广西自然科学基金项目(2015GXNSFAA139038);广西高校糖资源加工重点实验室开放基金资助(GXTZY201801)。

摘　　要：采用衰减全反射傅里叶变换红外光谱法(attenuated total reflectance-Fourier transform infrared spectroscopy,ATR-FTIR)结合向量夹角转化,快速测定牛油火锅底料中固体石蜡的含量。依据ATR-FTIR采集固体石蜡及各建模样本的红外光谱,通过向量夹角转换法,建立样本光谱和固体石蜡光谱的夹角值与固体石蜡含量的标准曲线,预测牛油火锅底料中石蜡添加量,实现快速分析。结果表明,所建立的标准曲线相关系数达到0.990 9,方法的相对标准偏差(relative standard deviation,RSD)为0.19%~0.33%,回收率为96.63%~108.34%。所建立的分析方法简便快捷,测定结果优于气相色谱法,可以推广应用到其他多组分复杂体系中石蜡残留量的检测。Attenuated total reflectance-Fourier transform infrared spectroscopy(ATR-FTIR) combined with vector angle conversion was applied to establish a rapid detection method of solid paraffin in butter hot pot seasoning.The infrared spectra of solid paraffin and modeling samples were collected by ATR-FTIR.Using vector angle conversion method,the standard curve between the angle value of sample spectra,solid paraffin spectra and the content of solid paraffin was established,so as to predict the amount of paraffin added in the butter hot pot seasoning,and achieve rapid analysis.The results showed that the established correlation coefficient of the standard curve was above 0.990 9 and the relative standard deviation of the method was 0.19 %-0.33 %,and the recovery rate was 96.63 %-108.34 %.The method was simple and rapid,and the determination results were better than the gas chromatography method.Meanwhile,the method could be applied to the determination of paraffin residue in other multicomponent complex systems.

关 键 词：固体石蜡 火锅底料 向量夹角 ATR/FTIR 

分 类 号：TS227[轻工技术与工程—粮食、油脂及植物蛋白工程]