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首页> 外文期刊>Journal of Agricultural and Food Chemistry >Supercritical carbon dioxide extraction of essential oils from Perovskia atriplicifolia Benth.
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Supercritical carbon dioxide extraction of essential oils from Perovskia atriplicifolia Benth.

机译：超临界二氧化碳萃取法从Perovskia atriplicifolia Benth中提取香精油。

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摘要

The supercritical fluid extraction (SFE) of the aerial parts of Perovskia atriplicifolia Benth. was studied. The effect of different parameters such as pressure, temperature, modifier identity, and modifier volume on the SFE of the plant was investigated. The extracts were analyzed by GC and GC-MS and compared with the essential oil obtained from P. atriplicifolia Benth by steam distillation. The supercritical extracts and the steam-distilled products had very different compositions. The main constituents of the oil obtained by steam distillation were 1,8-cineole, limonene, camphor, beta-caryophyllene, alpha-pinene, camphene, and alpha-humulene. On the other hand, the major components of SFE extracts were 1,8-cineole, limonene, camphor, beta-caryophyllene, gamma-cadinene, alpha-pinene, and alpha-terpinyl acetate. The results showed that increasing the temperature from 35 to 65degreesC (at a constant pressure of 100 atm) drastically reduced the number of extracted components. Also, the number of extracted constituents and the percent of main analytes increased when lower pressures were used. Using different modifiers (e.g., methanol, ethanol, dichloromethane, and hexane) for the extraction of the plant at low pressure (100 atm) and temperature (35degreesC) showed that hexane was more selective than the other modifiers.
机译：Perovskia atriplicifolia Benth空中部分的超临界流体萃取（SFE）。被研究了。研究了压力，温度，改性剂特性和改性剂体积等不同参数对植物SFE的影响。通过GC和GC-MS分析提取物，并与通过水蒸气蒸馏从P.atriplicifolia Benth获得的精油进行比较。超临界萃取物和蒸汽蒸馏产物具有非常不同的组成。通过蒸汽蒸馏获得的油的主要成分是1，8-桉树脑，柠檬烯，樟脑，β-石竹烯，α-pine烯，樟脑和α-hu草烯。另一方面，SFE提取物的主要成分是1,8-桉树脑，柠檬烯，樟脑，β-石竹烯，γ-卡丁烯，α-pine烯和α-萜品基乙酸酯。结果表明，将温度从35摄氏度提高到65摄氏度（在100个大气压的恒定压力下）可大大减少提取的组分数量。同样，当使用较低压力时，提取成分的数量和主要分析物的百分比也会增加。在低压（100atm）和温度（35℃）下使用不同的改性剂（例如甲醇，乙醇，二氯甲烷和己烷）萃取植物表明，己烷比其他改性剂更具选择性。

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