Hu. Pfeffer et L. Breuer, BTX measurements with diffusive samplers in the vicinity of a cokery: Comparison between ORSA-type samplers and pumped sampling, J ENVIR MON, 2(5), 2000, pp. 483-486
In the framework of new European directives in the field of ambient air qua
lity assessment specific requirements for measurement methods for benzene w
ill be defined and have to be met in the future. In a residential area in t
he vicinity of a cokery a comprehensive monitoring programme for BTX compou
nds (benzene, toluene, xylenes) was carried out with diffusive samplers. Me
asurement results from 20 sites show a distinct spatial distribution of ben
zene concentrations which is caused by the emissions of the plant. Comparis
ons with two pumped measurement methods reveal excellent agreement in the c
ase of benzene. An assessment of measurement uncertainty for the diffusive
method is presented in terms of standard deviations from parallel measureme
nts (precision) and by comparison with a reference method according to nati
onal and international standards. Data quality objectives required by an up
coming European directive for benzene can be met by diffusive sampling.