餐厨循环油的波谱性质及其FTIR识别技术的基础研究

本研究拟通过PCA法及DA方法分析对比标准食用油脂及地沟油的红外图谱，结合不同工艺条件精炼对地沟油成分脱除规律的研究，从内源污染物中搜寻地沟油潜在的特征吸收峰，然后进行色谱分离，根据核磁、质谱、红外波谱解析结果确定地沟油特征吸收峰对应的特征组份。再选择代表性参比物质结合化学计量学知识建立地沟油的识别模型，建立油脂多组分的FTIR同时测定方法，与现行标准方法对照，对开发的模型有效性进行验证，最终实现地沟油的定性、定量、快速、准确识别。

Refined edible oils and gutter oils were analyzed by FTIR and the spectrums were recorded and analyzed by discriminant analysis(DA) and PCA methods in this study.The removal rules of components in gutter oil with various refine methods were also explored. Based on previous results,the whole absorption band of gutter oil was screened with aim to find specific band. Then,identification of the specific componment and its peak assignment will be performed in combination of Mass Spectrum analysis,Nuclear Magnetic Resonance,Infrared spectral analysis. According to selected representive references, the quantitive analysis model of gutter oil was built by using FTIR coupled with chemometrics method. In addition, we aim to build an analytical method to acchieve simultaneous determination of multi parameters in gutter oil. The predicted results were compared with those obtained from the present standard method to validate the model developed in term of accuracy and precision.