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G. Quintas, B. Lendl, A. Pastor, M. de la Guarida:
"First-order derivative resolution of overlapped PAH peaks with common mass spectra in gas chromatography-mass spectrometry";
Talanta, 74 (2008), S. 747 - 752.

First-order deriv. of 15 points smoothed chromatograms of mixts. of benzo(b)fluoranthene (BbF) and benzo(k)fluoranthene (BkF) for the m/z 252 ion obtained using two microscans has been proposed as a simple alternative to the resoln. of overlapped chromatog. peaks of these two compds. which have identical mass spectra. The procedure provides limits of detection of 12 and 29 ng g-1 for BbF and BkF, resp. and offers the possibility to use the 250 and 248 ions to confirm the identity of these analytes