This paper describes a novel method of samplepreparation for the determination of trace concentrations ofpolycyclic aromatic hydrocarbons (PAHs) in high-boilingpetroleum products. Limits of quantitation of the investigatedPAHs in materials of this type range from tens ofnanograms per kilogram to <20 μg/kg. The studies revealedthat in order to separate most of interferences from theanalytes without a significant loss of PAHs, it is necessaryto use size exclusion chromatography as the first step ofsample preparation, followed by adsorption using normalphaseliquid chromatography. The use of orthogonalseparation procedure described in the paper allows theisolation of only a group of unsubstituted and substitutedaromatic hydrocarbons with a specific range of molar mass.The lower the required limit of quantitation of PAHs, thelarger is the scale of preparative liquid chromatography inboth steps of sample preparation needed. The use ofinternal standard allows quantitative results to be correctedfor the degree of recovery of PAHs during the samplepreparation step. Final determination can be carried outusing HPLC-FLD, GC-MS, or HPLC-UV-VIS/DAD. Thelast technique provides a degree of identification throughthe acquired UV-VIS spectra.
Authors
Additional information
- DOI
- Digital Object Identifier link open in new tab 10.1007/s00216-011-5134-9
- Category
- Publikacja w czasopiśmie
- Type
- artykuł w czasopiśmie wyróżnionym w JCR
- Language
- angielski
- Publication year
- 2011
