The results of five collaborative studies concerning the analysis of benzo-a-pyrene (BaP) in creosote by high performance liquid chromatography (HPLC) are presented. 6-12 labs participated in these studies over a time period of 3 years. These studies were vcarried out in order to evaluate the method which is described in the CEN standard ENV 1014-3. The concentrations of BaP in creosote samples analysed were in the range of 20 to 550 ppm. Whereas the values for repeatability (5-10%) were acceptable in nearly all collaborative trials performed those for reproducibility have improved significantly in the last study (23-33%). For the previous four collaborative trials the reasons for the relatively poor reproducibility values, especially for analytes containing low concentrationbs of BaP, could be detected. They were mainly based on problems with chromatographic separation and with integration. The method described in ENV 1014-3 has proven to be suitable for the determination of the BaP content in creosote.
ANKLAM Elke;
LIPP Markus;
MUELLER Anne;
VAN EIJK Jacob;
VAN LEEMPUT M.;
VAN STEERTEGEM G.;
1996-09-09
JRC13789
https://publications.jrc.ec.europa.eu/repository/handle/JRC13789,
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