Feasibility of the determination of polycyclic aromatic hydrocarbons in edible oils via unfolded partial least-squares/residual bilinearization and parallel factor analysis of fluorescence excitation emission matrices

TALANTA

卷:103

Article

Alarcon, Francis¹  Baez, Maria E.¹  Bravo, Manuel²  Richter, Pablo¹  Escandar, Graciela M.³  Olivieri, Alejandro C.³  Fuentes, Edwar¹ 

[1] Univ Chile, Fac Ciencias Quim & Farmaceut, Dept Quim Inorgan & Analit, Santiago, Chile

[2] Pontificia Univ Catolica Valparaiso, Fac Ciencias, Inst Quim, Lab Quim Analit & Ambiental, Valparaiso, Chile

[3] Univ Nacl Rosario, Fac Ciencias Bioquim & Farmaceut, Inst Quim Rosario IQUIR CONICET UNR, RA-2000 Rosario, Santa Fe, Argentina

关键词: Polycyclic aromatic hydrocarbons;    Edible oils;    Fluorescence excitation-emission matrices;    Multivariate calibration;   

DOI  :  10.1016/j.talanta.2012.10.080

来源: Elsevier

【 摘 要 】

The possibility possibility of simultaneously determining seven concerned heavy polycyclic aromatic hydrocarbons (PAHs) of the US-EPA priority pollutant list, in extra virgin olive and sunflower oils was examined using unfolded partial least-squares with residual bilinearization (U-PLS/RBL) and parallel factor analysis (PARAFAC). Both of these methods were applied to fluorescence excitation emission matrices. The compounds studied were benzo[a]anthracene, benzo[b]fluoranthene, benzo[k]fluoranthene, benzo[a]pyrene, dibenz[a,h]anthracene, benzo[g,h,i]perylene and indeno[1,2,3-c,d]-pyrene. The analysis was performed using fluorescence spectroscopy after a microwave assisted liquid-liquid extraction and solid-phase extraction on silica. The U-PLS/RBL algorithm exhibited the best performance for resolving the heavy PAH mixture in the presence of both the highly complex oil matrix and other unpredicted PAHs of the US-EPA list. The obtained limit of detection for the proposed method ranged from 0.07 to 2 mu g kg(-1). The predicted U-PLS/RBL concentrations were satisfactorily compared with those obtained using high-performance liquid chromatography with fluorescence detection. A simple analysis with a considerable reduction in time and solvent consumption in comparison with chromatography are the principal advantages of the proposed method. (C) 2012 Elsevier B.V. All rights reserved.

【 授权许可】

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