Optimization of SFE-CO2 of tea flowers (Camellia sinensis L.) and analysis of its extracts by GC-MS was written by Fu, Li-ya;Liu, Shu-juan;Ma, Meng-jun;Luo, Li-yong;Zeng, Liang. And the article was included in Xinan Daxue Xuebao, Ziran Kexueban in 2015.Product Details of 5444-75-7 The following contents are mentioned in the article:
Supercritical fluid extraction using carbon dioxide (SFE-CO2) was employed to study the optimal process parameters of tea flower (Camellia sinensis L.) and aroma anal. was made of its extracts by GC-MS. Three parameters-pressure, temperature and CO2 flow rate-were selected, and their influences on yield were investigated. Based on the results of an orthogonal experiment, the optimum process parameters were shown to be: extraction pressure 25 Mpa, extraction temperature 40°C and CO2 flow rate 25 kg/h. Under such a condition, the actual yield of extracts was 1.36%±0.09%. The results of range anal. indicated that the order of the three parameters influencing the extraction yield was CO2 flow rate>extraction pressure>extraction temperature The results of GC-MS anal. from MS with retention index (RI) showed that there were 97 aroma compounds in the extracts of tea flowers. They were alkanes (33.85%), esters (8.49%), aldehydes (2.35%), ketones (5.95%), alcs. (2.86%), acids (31.18%), terpenes (8.16%), the others (7.16%). This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Product Details of 5444-75-7).
2-Ethylhexyl benzoate (cas: 5444-75-7) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Product Details of 5444-75-7
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics