基于二维相关中红外光谱技术的邻苯二甲酸二丁酯检测研究

发布时间：2018-08-13 18:50

【摘要】：利用二维相关红外光谱技术对正己烷中常用塑化剂邻苯二甲酸二丁酯(DBP)的浓度变化进行了检测研究。利用傅里叶变换红外光谱仪对溶于正己烷中的DBP进行检测,得到742,1 078,1 123,1 281,1 467,1 728,2 873,2 933和2 961cm~(-1)特征吸收峰。将红外光谱分为三个波段400~1 200,1 200~1 900和2 900~4 000cm~(-1),通过二维相关光谱分析技术得知在1 123cm~(-1)波段(苯环面外摇摆及O-—C—O单键伸缩运动)、1 728cm~(-1)(C—O双键的伸缩运动)、2 873和2 961cm~(-1)(CH3伸缩运动)以及3 436cm~(-1)(苯环C—H的面内伸缩运动)对DBP浓度变化比较敏感。结合红外光谱宏观指纹技术以及二维相关光谱分析方法,能够较准确的分析出正己烷中的DBP的浓度变化,为食品中塑化剂含量的检测以及研究塑化剂的迁移规律提供了新的思路和方法。
[Abstract]:The concentration change of dibutyl phthalate (DBP), a common plasticizer in hexane, was determined by two-dimensional correlation infrared spectroscopy. Fourier transform infrared spectroscopy (FTIR) was used to detect DBP in n-hexane, and the characteristic absorption peaks of 742C 1 078N 1 281N 1 281N 1 467N 1 728N 2873 C 2 933 and 2961 cm ~ (-1) were obtained. The infrared spectrum is divided into three bands, 400,120,200,900 and 2,900,000cm ~ (-1). It is found that in the band of 1123cm ~ (-1) (benzene ring swing and O--C-O single bond stretching), the stretching motion of C-O double bond is 2 873 in the band of 1 123 cm ~ (-1). And 2961 cm ~ (-1) (CH3 stretching motion) and 3 436 cm ~ (-1) (in-plane stretching motion of benzene ring C-H) were sensitive to the change of DBP concentration. The DBP concentration in n-hexane can be accurately analyzed by using the infrared spectrum macrofingerprint technique and the two-dimensional correlation spectrum analysis method. It provides a new idea and method for the detection of plasticizer content in food and the study of the law of plasticizer migration.
【作者单位】：油气光学探测技术北京市重点实验室中国石油大学(北京);
【基金】：教育部留学回国人员科研启动基金项目中国石油大学(北京)优秀青年教师研究项目(2462015YQ0603)资助
【分类号】：TS207.3;O657.33

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