油脂经热处理可持续生成强致癌物3,4-苯并(a)芘（BaP），申请人前期工作发现热处理时油脂中的BaP含量大幅度降低，而减少的BaP去向和原因却尚未有学者开展系统研究，推测主要原因是通过化学转化生成BaP衍生物或迁移出油脂。采用GC-MS、NMR明确BaP衍生物的种类和结构，通过同位素示踪技术研明BaP在油脂热处理过程中的转化路径，结合油脂热氧化程度与BaP及衍生物形成规律的相关性分析，阐明BaP的化学转化机制。分别考察煎炸物吸油量、油烟排放量、油烟颗粒物化学成分和比表面积对于BaP及衍生物迁移的影响，研明BaP及衍生物在油脂、煎炸物、油烟颗粒之间的分布及迁移规律。通过建立多响应动力学模型，揭示油脂热处理中BaP及其衍生物形成的动力学特征。本项目所提出的研究思路在BaP研究领域未见报道，如取得预期成果，将为研明BaP在各类油脂热加工过程中的化学转化、迁移变化规律提供有益借鉴。

Benzopyrene, a kind of strong carcinogen will continue to grow during oil heat treatment. In the previous work of the applicant, it was found that the content of BaP in the oil was significantly reduced under the above conditions, but no scholars have conducted a systematic study on the direction and reason of the reduced BaP. It was speculated that the main reason was the generation of BaP derivatives through chemical conversion or the migration out of the oil by adsorption of frying matter and fume particles. The types and structures of BaP derivatives were qualitied by GC-MS and NMR, the conversion paths of BaP in the process of oil heat treatment were studied by stable isotope tracer technique, and the chemical conversion mechanism of BaP was elucidated by analyzing the correlation between the degree of thermal oxidation of oil (number and types of free radicals) and the formation rules of BaP and its derivatives. The effects of oil absorption, fume emissions, chemical composition and specific surface area of soot particles on the migration of BaP and its derivatives were investigated, and the distribution and migration rules of BaP and its derivatives among oils, frying materials and fume particles were studied. The dynamic characteristics of BaP and its derivatives in oil heat treatment were revealed by establishing a multi-response kinetic model. The research ideas proposed in this project have not been reported in the field of BaP research. If the expected results are achieved, it will provide useful references for studying the chemical conversion, migration and change rules of BaP in the thermal processing of various oils.