超声提取-分散液相微萃取-气相色谱质谱法测定大气PM2.5中15种邻苯二甲酸酯
Determination of fifteen phthalate esters in air particulate matter (PM2.5) by ultrasonic extraction-dispersive liquid-liquid microextraction combined with gas chromatography-mass spectrometry
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摘要: 建立了超声提取-分散液相微萃取联合气相色谱质谱法测定大气PM2.5中15种邻苯二甲酸酯的方法. 样品经过二氯甲烷和丙酮（1∶1，V/V）提取后，以1，2-二氯苯为萃取剂、丙酮为分散剂，运用分散液相微萃取法进一步萃取大气颗粒物PM2.5中的邻苯二甲酸酯. 结果显示，方法检出限为0.29-4.77 pg·m-3，最低检出限为0.96-15.74 pg·m-3，加标回收率为72.7%-110.9%，相对标准偏差为0.6%-9.4%，将此方法应用于苏州市某区大气PM2.5中的邻苯二甲酸酯的测定，检测出大部分邻苯二甲酸酯.Abstract: An analytical method for the simultaneous determination of fifteen phthalate esters in air particulate matter (PM2.5) was developed using ultrasonic extraction-dispersive liquid-liquid microextraction combined with gas chromatography-mass spectrometry. The samples were extracted with dichloromethane-acetone (1:1, V/V) mixed solvent by ultrasonic extraction. 1,2-dichlorobenzene was used as extractant and acetone was used as dispersive solvent,dispersive liquid-liquid microextraction was applied to analyze air particulate matter (PM2.5) samples. The limits of detection (LOD) ranged from 0.29 to 4.77 pg·m-3 and the limits of quanification (LOQ) ranged from 0.96 to 15.74 pg·m-3. The spiked recoveries ranged from 72.7% to 110.9% and the RSDs ranged from 0.6% to 9.4%,respectively. This new method was successfully applied for the analysis of the phthalate esters in air particulate matter (PM2.5) in Suzhou and most of PAEs were detected in the samples.
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