Analysis of Essential Oil Content and Composition of Roman Chamomile
To study the oil yield and composition differences of four different parts and the oil yield with different flowering rates of Roman chamomile.Methods:The volatile oil of Roman chamomile was extracted by steam dis-tillation,and the chemical composition of four essential oils was detected and analyzed by GC-MS.Results:The oil yield of Roman chamomile with flowering rate of 30％is only 0.12％,and the oil yield with flowering rate of 70％is 0.2％.The yield of essential oil of Roman chamomile with flowering rate of 30％was only 0.12％,and the yield of essential oil with flowering rate of 70％was 0.2％.A total of 50 chemical components were detected in the essential oil of Roman chamomile prepared from whole flowers.60 chemical components were detected in the essential oil of Roman chamomile prepared from whole leaves.59 chemical components were detected in the essential oil of Roman chamomile prepared from 20 cm stems under flowers,and 42 chemical components were detected in the essential oil of Roman chamomile prepared from 20 cm stems on roots.Esters and terpenes are the main chemical components of the four essential oils,but the main components are different.Conclusion:The high-er the flowering rate of Roman chamomile,the higher the essential oil content.The physical properties of essential oil of Roman chamomile prepared from different parts are similar,but the content of components is different,which makes the fragrance of essential oil different and may be related to the different components of raw materi-als.
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