Determination of Parent and Oxygenated Polycyclic Aromatic Hydrocarbons (PAHs) in Waste Cooking Oil and Oil Deodorizer Distillate by GC-QQQ-MS
Determination of Parent and Oxygenated Polycyclic Aromatic Hydrocarbons (PAHs) in Waste Cooking Oil and Oil Deodorizer Distillate by GC-QQQ-MS
复制标题
采用 GC-MS/MS 测定废弃食用油和油脱臭馏出物中的母体和含氧多环芳烃 (PAH)
DOI：
10.5740/jaoacint.19-0085
复制
发表时间：
2019-11-01
影响因子：
1.6
通讯作者：
Gong, Guangyi
中科院分区：
文献类型：
--
作者：
Teng, Chong;Wu, Shimin;Gong, Guangyi
背景资料：多环芳烃（PAHs）和含氧多环芳烃（OPAH）是存在于环境和食品中的一类污染物。由于它们的致癌性和致突变性，对人类健康构成了极大的威胁。很少有研究集中在他们的浓度在废食用油（WCO）和石油蒸馏器馏出物（ODD）。目的：本研究的目的是：（1）设计一种可靠的方法，同时测定WCO和ODD中的16种多环芳烃和4种邻苯二甲酸酯（OPAH）;（2）测定和分析实际样品中的PAH和OPAH浓度，为进一步研究提供参考。方法：多环芳烃的测定方法包括双液液萃取、双固相萃取和气相色谱三重四极杆串联质谱法。氧化指数通过滴定法测定。结果：该方法线性关系良好（R-2 > 0.99），回收率为55.01-126.16%，57.48-128.97%。测定了10个WCO和5个ODD样品中16种多环芳烃的总浓度，WCO和ODD中的总浓度分别为16.34 ~ 239.01和101.08 ~ 198.04 μ g/kg。在16种多环芳烃中，三环多环芳烃的贡献最大。结果还发现，酸值与OPAH的浓度有很强的相关性，可能是因为游离脂肪酸的贡献，OPAH的形成。结论：该方法可用于WCO和ODD中多环芳烃和邻苯多环芳烃的分析。
Background: Polycyclic aromatic hydrocarbons (PAHs) and oxygenated PAHs (OPAHs) are classes of contaminants that are present in the environment and food. They pose a great threat to human health because of their carcinogenicity and mutagenicity. Very few studies have focused on their concentration in waste cooking oil (WCO) and oil deodorizer distillate (ODD). Objective: This study aimed (1) to design a reliable method to determine 16 PAHs and 4 OPAHs in both WCO and ODD and (2) to determine and analyze PAH and OPAH concentrations in actual samples to provide references for further research. Method: The PAH determination approach included double liquid liquid extraction, double solid-phase extraction, and GC triple quadrupole tandem MS determination. Oxidation indices were determined by titrimetry. Results: The method reached good linearity (R-2 > 0.99) and an acceptable recovery rate (55.01-126.16% for WCO and 57.48-128.97% for ODD). Ten WCO and five ODD samples were determined, and the total concentration of 16 PAHs varied from 16.34 to 239.01 and 101.08 to 198.04 mu g/kg in WCO and ODD, respectively. Among the 16 PAHs, three-ring PAHs typically contributed the most. It was also found that the acid value has a strong correlation with the concentration of OPAHs, probably because of the contribution of free fatty acids to OPAH formation. Conclusions: The proposed method was effective in the analysis of PAHs and OPAHs in WCO and ODD.