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

采用加速溶剂萃取一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290nm，发射波长为430nm。方法线性良好，检出限为0．08μg／L，当采样体积为1080m。时，最低检测质量浓度为3×10^-7μg／m^3（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。

The Determination of B(a)P in Ambient Air by Accelerated Solvent Extractor High Performance Liquid Chromatography

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^-7μg/m^3. 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.