liquid chromatography/tandem mass spectrometry (LC-MS/MS) method for the determination of phenolic polycyclic aromatic hydrocarbons (OH-PAH) in urine of non-smokers and smokers

• Published in: Analytical and bioanalytical chemistry 2011-01, Vol.399 (2), p.877-889
• Main Authors: Ramsauer, Bernhard, Sterz, Katharina, Hagedorn, Heinz-Werner, Engl, Johannes, Scherer, Gerhard, McEwan, Mike, Errington, Graham, Shepperd, Jim, Cheung, Francis
• Format: Article
• Language: English
• Subjects: Analytical Chemistry; Applied sciences; Biochemistry; Calibration; Characterization and Evaluation of Materials; Chemistry; Chemistry and Materials Science; Chromatographic methods and physical methods associated with chromatography; Chromatography, High Pressure Liquid - methods; Exact sciences and technology; Fluorenes - metabolism; Fluorenes - urine; Food Science; Global environmental pollution; Humans; Laboratory Medicine; LC-MS/MS; Monitoring/Environmental Analysis; Naphthalenes - metabolism; Naphthalenes - urine; Non-smokers; Original Paper; Other chromatographic methods; Phenanthrenes - metabolism; Phenanthrenes - urine; Pollution; polycyclic aromatic hydrocarbons; Polycyclic Aromatic Hydrocarbons - metabolism; Polycyclic Aromatic Hydrocarbons - urine; Pyrenes - metabolism; Smokers; Smoking - metabolism; Smoking - urine; Spectrometric and optical methods; Tandem Mass Spectrometry - methods; urine
• ISSN: 1618-2642; 1618-2650
• DOI: 10.1007/s00216-010-4355-7

Polycyclic aromatic hydrocarbons (PAH) are products of the incomplete combustion of organic materials and, therefore, occur ubiquitously in the environment and also in tobacco smoke. Since some PAH have been classified as carcinogens, it is important to have access to suitable analytical methods for biomarkers of exposure to this class of compounds. Past experience has shown that measuring a profile of PAH metabolites is more informative than metabolites of a single PAH. Assessment of environmental and smoking-related exposure levels requires analytical methods with high sensitivity and specificity. In addition, these methods should be fast enough to allow high throughput. With these pre-conditions in mind, we developed and validated a high-performance liquid chromatographic method with tandem mass spectrometric detection (LC-MS/MS) for the determination of phenolic metabolites of naphthalene, fluorene, phenanthrene and pyrene in urine of smokers and non-smokers. Sample work-up comprised enzymatic hydrolysis of urinary conjugates and solid-phase extraction on C18 cartridges. The method showed good specificity, sensitivity, and accuracy for the intended purpose and was also sufficiently rapid with a sample throughput of about 350 per week. Application to urine samples of 100 smokers and 50 non-smokers showed significant differences between both groups for all measured PAH metabolites, and strong correlations with markers of daily smoke exposure in smoker urine. Urinary levels were in good agreement with previously reported data using different methodologies. In conclusion, the developed LC-MS/MS method is suitable for the quantification of phenolic PAH metabolites of naphthalene, fluorene, phenanthrene, and pyrene in smoker and non-smoker urine. [graphic removed]