TITLE

Evaluation of gas chromatography columns for the analysis of the 15 + 1 EU-priority polycyclic aromatic hydrocarbons (PAHs)

AUTHOR(S)
Gómez-Ruiz, José Ángel; Wenzl, Thomas
PUB. DATE
March 2009
SOURCE
Analytical & Bioanalytical Chemistry;Mar2009, Vol. 393 Issue 6/7, p1697
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Three different stationary phases were investigated for the analysis of the 15 + 1 EU-priority polycyclic aromatic hydrocarbons (PAHs) by gas chromatography-mass spectrometry. In addition to the most commonly used 5% phenyl methylpolysiloxane, a mid-polar phase (50% phenyl methylpolysiloxane) and a recently commercialised mid-polar to polar phase (Optima® δ-6), were evaluated. Challenging groups of PAHs in terms of separation, such as the pair dibenz[ a, h]anthracene-indeno[1,2,3,- cd]pyrene and the two groups benzo[ b]fluoranthene-benzo[ k]fluoranthene-benzo[ j]fluoranthene and cyclopenta[ cd]pyrene-benz[ a]anthracene-chrysene, were satisfactorily separated by using the mid-polar phase. Moreover, discrimination in terms of peak height for the heaviest PAHs (caused from the strong interaction of these compounds with the stationary phase) was reduced without compromising the resolution of the other target analytes when applying the mid-polar phase in a tailor-made column geometry (20 m × 0.18 mm internal diameter and 0.14 μm film thickness) in combination with optimised chromatographic conditions. A significant enhancement of the analytical sensitivity for dibenzopyrenes is demonstrated with an almost threefold increase of the signal-to-noise (S/N) ratio for dibenzo[ a, h]pyrene, the last eluting PAH. The ability of the selected column to separate potentially interfering PAHs from the target analytes in both solvent solutions and food extracts is demonstrated.
ACCESSION #
36778887

 

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