Trace Analysis of 3-Hydroxy Benzo[a]pyrene in Urine for the Biomonitoring of Human Exposure to Polycyclic Aromatic Hydrocarbons

Determination of benzo[a]pyrene (BaP) metabolites in urine can provide direct insight into recent exposure to BaP integrated from all uptake routes. In order to detect 3-OH BaP in human urine after exposure to BaP at the workplace, extremely sensitive methods need to be developed. In this paper, a n...

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Bibliographic Details
Published in:Journal of analytical toxicology 1994-07, Vol.18 (4), p.195-204
Main Authors: Ariese, Freek, Verkaik, Marieke, Hoornweg, Gerard P., van de Nesse, Ronald J., Jukema-Leenstra, Swanette R., Hofstraat, Johannes W., Gooijer, Cees, Velthorst, Nel H.
Format: Article
Language:English
Subjects:
Benzo(a)pyrene
Benzopyrenes - analysis
Biological and medical sciences
biomarkers
biomonitoring
Chemical and industrial products toxicology. Toxic occupational diseases
Chromatography, High Pressure Liquid - methods
Environmental Monitoring - methods
Fluorescence
High-performance liquid chromatography
Humans
Lasers
Medical sciences
Metabolites
Occupational Exposure
Polycyclic aromatic hydrocarbons
Polycyclic Compounds - metabolism
Pyrene
Pyrenes - analysis
Spectrometry
Spectrophotometry - methods
Toxicology
Urine
Various organic compounds
Workers
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Summary:Determination of benzo[a]pyrene (BaP) metabolites in urine can provide direct insight into recent exposure to BaP integrated from all uptake routes. In order to detect 3-OH BaP in human urine after exposure to BaP at the workplace, extremely sensitive methods need to be developed. In this paper, a new extraction method is presented, and two laserbased fluorescence techniques are evaluated. Using HPLC with laser-induced fluorescence detection, a detection limit of 8 ng/L was obtained. With laser-excited Shpol'skii spectrometry after chemical derivatization, 3-OH BaP could be detected at even a 0.5-ng/L concentration. In a pilot study, urine samples from coke-oven workers and from occupationally nonexposed control persons were analyzed. In the control samples, the average 3-OH BaP concentration was 8.3 ng/L; the 3-OH BaP concentrations were found to be highly correlated (r2 = 0.89) with urinary 1-OH pyrene, a widely used biomarker for polycyclic aromatic hydrocarbon (PAH) exposure. Significantly elevated 1-OH pyrene concentrations were measured in urine samples from coke-oven workers, but in most samples a corresponding increase of 3-OH BaP was not observed. Possible explanations for this discrepancy are discussed.
ISSN:0146-4760
1945-2403
DOI:10.1093/jat/18.4.195