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    超高效液相色谱-荧光检测器法测定居民厨房空气中15种多环芳烃的含量及其影响因素分析

    Determination of 15 Polycyclic Aromatic Hydrocarbons in Air of Residential Kitchen by Ultra-High Performance Liquid Chromatography-Fluorescence Detector and Analysis of Their Influencing Factors

    • 摘要: 使用XAD-2吸附管和玻璃纤维滤膜采集居民厨房空气样品,用乙腈提取后在ZORBAX Eclipse PAH Rapid Resolution HD 色谱柱 (100 mm×3.0 mm,1.8 μm)上分离,采用超高效液相色谱-荧光检测器法(UHPLC-FLD)测定其中美国国家环境保护局(US EPA)优先控制的15种多环芳烃(PAHs)含量,结合调查问卷,利用SPSS 26.0软件分析影响PAHs产生的潜在因素。结果显示,15种PAHs的质量浓度在0.001~0.5 mg·L−1内与对应的峰面积呈线性关系,方法检出限为0.09~1.46 ng·m−3。按照标准加入法进行回收试验,回收率为72.0%~98.8%,测定值的相对标准偏差(n=6)均小于6.0%。所调查居民厨房空气中总PAHs的质量浓度为117.1~919.1 ng·m−3;相对于水煮的烹饪方式,油炸和煎炒会产生更多PAHs;相对于使用橄榄油炒菜,使用花生油炒菜会产生更多PAHs;月均用油量越多的居民厨房产生的PAHs越多。

       

      Abstract: The air samples of residential kitchen were collected using XAD-2 adsorption tubes and glass fiber filters, extracted with acetonitrile and separated on ZORBAX Eclipse PAH Rapid Resolution HD column (100 mm ×3.0 mm,1.8 μm), in which 15 polycyclic aromatic hydrocarbons (PAHs) prioritized for control by the US Environmental Protection Agency (US EPA) were determined by ultra-high performance liquid chromatography-fluorescence detector (UHPLC-FLD). Combined with the questionnaire survey, the potential factors influencing the generation of PAHs were analyzed using SPSS 26.0 software. As shown by the results, linear relationships between the corresponding peak areas and mass concentrations of 15 PAHs were kept in the range of 0.001-0.5 mg · L−1, with detection limits of the method in the range of 0.09-1.46 ng · m−3. Test for recovery was made by the standard addition method, giving results in the range of 72.0%-98.8%, with RSDs (n=6) of the determined values less than 6.0%. The total mass concentrations of PAHs in the air of the surveyed residential kitchens were in the range of 117.1-919.1 ng · m−3. Compared with the cooking method of boiling, frying and stir-frying would generate more PAHs. Compared with cooking with olive oil, cooking with peanut oil would generate more PAHs. More PAHs were generated in residential kitchen with a higher average monthly oil usage.

       

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