ATMOSPHERIC EMISSION OF POLYCYCLIC AROMATIC HYDROCARBONS IN SAMPLING AREAS OF THE GERMAN ENVIRONMENTAL SPECIMEN BANK. METHOD FOR THE PRECISE MEASUREMENT OF GASEOUS AND PARTICLE-ASSOCIATED POLYCYCLIC AROMATIC HYDROCARBONS IN THE SUB-NANOGRAM RANGE USI

摘要

The objective of this study was to determine the impact by polycyclic aromatic hydrocarbons (PAHs) in ar- eas in which samples are regularly taken by the German Environmental Specimen Bank (GESB). A filter combination consisting of a glass fibre and a PU foam filter has been used to completely collect atmospheric pollutants allowing a quantitative extraction of the PAHs collected and a simple cleanup. The mass spec- trometric evaluation using deuterated standards resulted in standard deviations of 1-6/100 for various PAHs detected by this method (extraction + cleanup + MS-SIM) applied to the sub-nanogram range. The repeat- ability of the method (sampling + analysis) has been checked by taking 5 different samples with 5 different samplers at the same location. The sampling period was 6 h and resulted in variation coefficients of 2.1- 10.2/100.