Room Temperature Fluorescence Spectroscopy Of Benzo[A]Pyrene Metabolites On Octadecyl Extraction Membranes

Keywords

Asymmetric least squares; Benzo[a]pyrene; Benzo[a]pyrene metabolites; Room-temperature fluorescence; Solid-phase extraction; Urine analysis

Abstract

Benzo[a]pyrene (B[a]P) is a prototypic carcinogenic polycyclic aromatic hydrocarbon (PAH), which requires metabolic activation to produce its detrimental effects. Measurement of B[a]P metabolites in human urine could provide a direct way to assess individual differences in susceptibility to PAH-related cancer. This article focuses on the development of screening methodology for the routine analysis of B[a]P metabolites in urine samples. It explores the solid-surface room-temperature fluorescence (RTF) properties of 3-hydroxy-benzo[a]pyrene, benzo[a]pyrene-trans-9,10-dihydrodiol, benzo[a]pyrene-r-7,t-8,c-9-tetrahydrotriol and benzo[a]pyrene-r-7,t-8,c-9,c-10-tetrahydrotetrol previously extracted from urine samples with octadecyl-silica membranes. Relative standard deviations varying from 2.1% (benzo[a]pyrene-r-7,t-8,c-9-tetrahydrotriol) to 8.6% (3-hydroxy-benzo[a]pyrene) are obtained with the aid of fiber optic probe that eliminates the need for manual optimization of signal intensities. Analytical recoveries from human urine samples varied from 87.5 ± 3.1% (3-hydroxy-benzo[a]pyrene) to 99.8 ± 2.5% (benzo[a]pyrene-r-7,t-8,c-9,c-10-tetrahydrotetrol). The excellent analytical figures of merit and the simplicity of the experimental procedure demonstrate the potential of this approach for screening biomarkers of PAH exposure in numerous urine samples.

Publication Date

11-1-2016

Publication Title

Microchemical Journal

Volume

129

Number of Pages

83-89

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.microc.2016.06.010

Socpus ID

84974791412 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84974791412

This document is currently not available here.

Share

COinS