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Biological monitoring of occupational exposure to polycyclic aromatic hydrocarbons (PAH) by determination of monohydroxylated metabolites of phenanthrene and pyrene in urine

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Abstract

Objectives

The aim of our study was to assess individual polycyclic aromatic hydrocarbon (PAH) exposure of workers coming from three different industrial branches by several parameters of external and internal exposure. By analysing the relationships between those markers the suitability of individual parameters [e.g. monohydroxylated phenanthrene (Phe) metabolites] for exposure surveillance should be evaluated.

Methods

The total study population consisted of 255 male workers (age: 19-62, mean: 39.61 years), who were employed in coke production (n = 40), production of graphite electrodes and special carbon products (92), or production of refractory materials (123), respectively. For each worker external PAH exposure was determined by personal air sampling of 16 PAH, including Phe, pyrene (Pyr) and benzo[a]pyrene (BaP). For determination of internal PAH exposure the excretion of the PAH metabolites 1-, 2 + 9-, 3-, 4-hydroxyphenanthrene and 1-hydroxypyrene was measured in post-shift urine samples of all workers.

Results

In the total study population median total PAH exposure and exposure to BaP were 30.62 and 0.27 μg/m³, respectively. A calculation of PAH profiles resulted in substantial branch-related variations with Phe being a major component. Considering all branches the median excretions of 1-hydroxypyrene and hydroxyphenanthrenes (sum) were 6.68 and 11.22 μg/g creatinine. A correlation analysis yielded a good correlation between total ambient PAH exposure and excretion of hydroxyphenanthrenes in urine (r = 0.662; P < 0.01), but no significant correlation between Phe metabolites and the carcinogenic BaP. For 1-hydroxypyrene and BaP a weak but significant association was found (r = 0.235; P < 0.01).

Conclusions

Considering the results of the correlation analysis hydroxyphenanthrenes in urine should reflect an uptake of lowly condensed volatile PAH rather than an incorporation of highly condensed PAH like BaP which should be reflected better by 1-hydroxypyrene. Therefore, the determination of hydroxyphenanthrenes in addition to the well-established marker 1-hydroxypyrene could offer some further information about the exposure situation at a particular work place.

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Acknowledgements

We gratefully thank the German Hauptverband der gewerblichen Berufsgenossenschaften (HVBG), Sankt Augustin, Germany for financial and scientific support of the German PAH study and all the involved persons from companies and Berufsgenossenschaften for their excellent cooperation.

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Authors and Affiliations

  1. Institut für Arbeits-, Sozial- und Umweltmedizin der Johannes Gutenberg-Universität Mainz, Obere Zahlbacher Straße 67, 55131, Mainz, Germany

    Bernd Rossbach & Stephan Letzel

  2. Institut und Poliklinik für Arbeits-, Sozial- und Umweltmedizin der Friedrich-Alexander-Universität Erlangen-Nürnberg, Schillerstraße 25/29, 91054, Erlangen, Germany

    Ralf Preuss, Hans Drexler & Jürgen Angerer

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  1. Bernd Rossbach
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  2. Ralf Preuss
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  5. Jürgen Angerer
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Correspondence to Bernd Rossbach.

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Rossbach, B., Preuss, R., Letzel, S. et al. Biological monitoring of occupational exposure to polycyclic aromatic hydrocarbons (PAH) by determination of monohydroxylated metabolites of phenanthrene and pyrene in urine. Int Arch Occup Environ Health 81, 221–229 (2007). https://doi.org/10.1007/s00420-007-0209-9

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