Evolution of camphor and others components in the essential oils of two labiate species during the biological cycle

Essential oils are used in perfumes, cooking and in pharmacy. A special stu dy had been done on essential oils issued from two plants of Lavendin and R osemary, during the annual biological cycle. The GC/MS technique was used a nd identification of separated components was achieved by retention times i n comparison with respective standards and by mass spectra comparison. Quan titative determinations of camphor, cineol, linalool, linalyl acetate in La vendin, and camphor, a-pinene, cineol in Rosemary, were done by GC/FID. n-D odecane was used as internal standard. The aim of this study was to choose the optimum period of plant gathering, with respect to the level of camphor and other major components. An increasing of the camphor is observed in th e leaves. Camphor. present in essential oils of Lavendin and Rosemary, has new pharmaceutical applications, mainly as stimulant, cardiac and respirato ry analeptic.