A Highly Sensitive and Automatic Analytical Method for Carcinogenic Polycyclic Aromatic Hydrocarbons(PAHs) in Indoor Airborne Particulates.

概要

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A highly sensitive and automatic analytical method for polycyclic aromatic hydrocarbons (PAHs) in indoor airborne Particulates was developed and applied to a preliminary survey of indoor PAH pollution. The PAH analysis consists of ultrasonic extraction of PAH from airborne particulates with dichloromethane, evaporation of the solvent and dissolution of the residue in acetonitrile, and separation analysis by a newly developed high performance liquid chromatographic (HPLC) method. The HPLC system consists of pre-column, main column, 2 spectrofluorometers, data processor and system controller. Twenty PAHs had been analyzed reliably by the present method. Recovery of PAHs from airborne particulates ranged from 91.4±1.7% (dibenzo [a, h] pyrene) to 106±2.4% (pyrene) . Quantification limit ranged from 2.4 (chrysene, dibenz [a, h] anthracene) to 89 (dibenzo [a, i] pyrene) pg. The method was applied to a preliminary indoor survey for one week in the late summer season at 6 homes in Shizuoka. Seventeen PAHs were found in airborne particulate samples which were collected by a mini-pump system at a flow rate of 1.0 l/min for 24 hours. Indoor PAH levels varied largely according to the life style, living conditions, and sampling date.
日本環境化学会の論文