Pyxinaceae

Gas chromatography and mass spectrometry Xanthones, anthraquinones, dibenzofurans, terpenes and pulvinic acid derivates which lack thermolabile ester groups can be studied by gas chromatography with mass spectrometry (GCMS). Xanthones in hchens were studied by injecting a lichen extract directly into a mass spectrometer. More recently, the main terpenoid comptments of the lichens of the family Pyxinaceae have been studied by GMCS (Nash 1996 Karunaratne et al. 2005). 

Aptroot A, Berendsen W (1989) The Nature of Pruina on Pyxinaceae (Lichenes). Proc Kon Nederl Akad v Wetenschapen 92 409... 

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