加速溶剂萃取-高效液相色谱法测定环境空气中的苯并（a）芘

摘要

Benzo ( a ) pyrene [ B ( a ) P ] in ambient air was determined by accelerated solvent extractor (ASE)-HPLC.B(a)P was separated by reversed-phase HPLC under a gradient elution with acetonitrile and water as mobile phase and detected by fluorescence detector with an excitation wavelength 290 nm and detection wavelength 430 nm. When sampling volume was 1 080 m3 , the minimum detection concentrations was 3 ×10 -7 μg/m3.The recoveries of B(a)P by ASE were 87.2% ~109%.Both ASE and ultrasonic extraction ( UA) had high extraction efficiency .Compared with UA, ASE showed the advantages of low acetonitrile con-sumption and environment friendliness .%采用加速溶剂萃取-高效液相色谱法荧光检测器测定环境空气中的苯并（ a）芘，以乙腈/水为流动相，检测器激发波长为290 nm，发射波长为430 nm。方法线性良好，检出限为0．08μg/L，当采样体积为1080 m3时，最低检测质量浓度为3×10-7μg/m3（标准状态下），实际样品加标回收率为87．2％～109％。与超声波萃取法相比，两种方法回收率相近，而加速溶剂萃取法乙腈用量更少。