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目的建立大气颗粒物PM_(2.5)中16种多环芳烃(PAHs)的超高效液相色谱-二极管阵列检测器测定法。方法空气样品滤膜经乙腈密封超声提取,以乙腈-水为流动相进行梯度洗脱,过Waters ACQUITY UPLC~BEH Shield RP18色谱柱(2.1 mm×150 mm,1.7μm),超高效液相色谱法测定,反相色谱法梯度淋洗分离后,二极管阵列检测器检测。结果在10~1 000μg/L的范围内,所得16种PAHs的回归方程均呈良好的线性关系良好(r>0.999 9)。方法的检出限为0.5~6.0μg/L,平均回收率为88.9%~119.4%,RSD为0.3%~4.9%。结论该方法操作简单,灵敏高,分析速度快,适用于空气中16种PAHs的监测。
Aim To establish an ultra performance liquid chromatography - diode array detector method for the determination of 16 polycyclic aromatic hydrocarbons (PAHs) in particulate matter PM_ (2.5). Methods The air sample membrane was extracted with acetonitrile and sealed with acetonitrile. The mobile phases were eluted with gradient elution on a Waters ACQUITY UPLC ~ BEH Shield RP18 column (2.1 mm × 150 mm, 1.7 μm) Determination of the method, reversed-phase chromatography gradient elution after separation, diode array detector detection. Results The regression equation of 16 PAHs showed a good linear relationship (r> 0.999 9) within the range of 10-1 000 μg / L. The detection limit of the method was 0.5-6.0μg / L, the average recovery was 88.9% -119.4%, RSD was 0.3% -4.9%. Conclusion The method is simple, sensitive, and fast in analysis. It is suitable for the monitoring of 16 kinds of PAHs in the air.