title: Single-laboratory validation of a saponification method for the determination of four polycyclic aromatic hydrocarbons in edible oils by HPLC-fluorescence detection.
abstract: An analytical method is reported for the determination of four polycyclic aromatic hydrocarbons (benzo[a]pyrene (BaP), benz[a]anthracene (BaA), benzo[b]fluoranthene (BbF) and chrysene (CHR)) in edible oils (sesame, maize, sunflower and olive oil) by high-performance liquid chromatography. Sample preparation is based on three steps including saponification, liquid-liquid partitioning and, finally, clean-up by solid phase extraction on 2 g of silica. Guidance on single-laboratory validation of the proposed analysis method was taken from the second edition of the Eurachem guide on method validation. The lower level of the working range of the method was determined by the limits of quantification of the individual analytes, and the upper level was equal to 5.0 µg kg(-1). The limits of detection and quantification of the four PAHs ranged from 0.06 to 0.12 µg kg(-1) and from 0.13 to 0.24 µg kg(-1). Recoveries of more than 84.8% were achieved for all four PAHs at two concentration levels (2.5 and 5.0 µg kg(-1)), and expanded relative measurement uncertainties were below 20%. The performance of the validated method was in all aspects compliant with provisions set in European Union legislation for the performance of analytical methods employed in the official control of food. The applicability of the method to routine samples was evaluated based on a limited number of commercial edible oil samples.
authors.affiliation: a Pamukkale University , Vocational High School of Technical Sciences, Department of Chemistry and Chemical Technology , 20070 Kinikli , Denizli , Turkey.|b European Commission, Joint Research Centre, Institute for Reference Materials and Measurements , Retieseweg 111, B-2440 Geel , Belgium.
authors.forename: Abdullah
authors.initials: A
authors.lastname: Akdoğan
authors.affiliation: b European Commission, Joint Research Centre, Institute for Reference Materials and Measurements , Retieseweg 111, B-2440 Geel , Belgium.
authors.forename: Gerhard
authors.initials: G
authors.lastname: Buttinger
authors.affiliation: b European Commission, Joint Research Centre, Institute for Reference Materials and Measurements , Retieseweg 111, B-2440 Geel , Belgium.
authors.forename: Thomas
authors.initials: T
authors.lastname: Wenzl
mesh_terms: D002851:Chromatography, High Pressure Liquid; D005453:Fluorescence; D007753:Laboratories; D010938:Plant Oils / Q000737:chemistry*; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D052616:Solid Phase Extraction; D013050:Spectrometry, Fluorescence
chemical_list: D010938:Plant Oils; D011084:Polycyclic Aromatic Hydrocarbons
keywords: Edible oil; extraction; high-performance liquid chromatography; polycyclic aromatic hydrocarbons; saponification