Evaluation of an ultrasonic extraction method compared with the Soxhlet extraction method for the determination of polyaromatic hydrocarbons and n-alkanes in airborne particulate matter

摘要

An ultrasonic extraction method was evaluated for a GC/MS determination of polyaro- matic hydrocarbons (PAHs) and n-alkanes in airborne particulate matter, compared with the Soxhlet extraction method. Three airborne particulate samples collected at an industrial area of Kitakyushu City, a heavy traffic area of Kawasaki City, and Urban Dust (Standard Reference Material 1649) were extracted for seven PAHs and eight n-alkanes by both the ultrasonic extraction method with cyclohexane-ethanol (3 : 1) and Soxhlet extraction method with benzene-ethanol (3 : 1). Vehicle Exhaust Particulate (NIES No. 8) was also extracted for the compounds by the two methods. The results of the tar- get compounds by the ultrasonic extraction method well agreed with those by the Soxhlet extraction method, except for the vehicle exhaust particulate.