بررسی مقایسه کمیت و کیفیت ابسولوت و کانکریت حاصل از گلبرگ خشک و غنچه خشک گل محمدی در مقایسه با گلبرگ و غنچه تازه

‭Rosa damascena Mill. is one of the important Rose species for production of aromatic compounds. The oil and distilled water of Rose are used vastly in medicinal, hygienic-cosmetic and food industries. In Iran, there are vast gardens of Rosa damascena in Kashan, Kerman, Trabriz, Sahand and Fars province. In this research, the effect of drying on yield and chemical composition of concrete and absolutes of three Rosa damascena genotypes (from national botanical garden of Iran) were examined. Four samples from each genotype (1‬ص ‭.fresf flowers, 2- shade dried. flower;-3- fresh bloom and 4- shade dried bloom) were prepared. The concretes were extracted by petroleum ether and the waxes were removed by shaking the concrete with absolute ethanol and remaining at ‬ص ‭lSoC for 10 minute. Yields of concrete and absolutes were calculated. The absolutes were analyzed by capillary GC and GC/MS. The results showed that drying had negative effect on yields of concrete and absolute of Rosa damascena. Ananlysis and identification of the chemical components in the absolutes showed thet extraction of absolutes from fresh flowers and bloom was better than dried samples, but if for any reason we need to extract absolute from dried plant material, drying and storage of bloom was better than flowers.‬