1 23 Food Analytical Methods ISSN 1936-9751 Volume 9 Number 2 Food Anal. Methods (2016) 9:311-321 DOI 10.1007/s12161-015-0196-5 Comparative Analysis of the Volatile Profiles from Wild, Cultivated, and Commercial Roots of Gentiana lutea L. by Headspace Solid Phase Microextraction (HS–SPME) Coupled to Gas Chromatography Mass Spectrometry (GC–MS) Ahmed M. Mustafa, Giovanni Caprioli, Filippo Maggi, Sauro Vittori & Gianni Sagratini