steam distillation
4.Methods Volatile oil from Clematis obscura was extracted by steam distillation, and its chemical components and relative contents were separated and analyzed by GC/MS.
5.The 20 constituents in essential oil of the branches and leaves of the Sabina Vulgaris antoine were extracted by steam distillation-extraction, and identified by capillary gas chromatography and gas chromatography-mass spectrometry.
6.The essential oil and extractum are extracted from its stem, leaf and flower by steam distillation and solvent extraction. According to the analysis, it contains 0.1003% essential oil and 0.74% extraction in average.
7.The essential oil of Cajanus cajan leaves were separated by steam distillation and its consti-tuents were analzed by GC/MS/MSD method using glass cross--linking capillary column.
8.OBJECTIVE:To analyze and compare the chemical constituents of volatile oil of rhizome and root in Acorus calamus L.METHODS:The steam distillation was used to prepare the volatile oil from the rhizome and root of Acorus calamus L .
9.Through analyzing the effect of temperature and nitrogen on crude oil viscosity the influences of different nitrogen injection volume and injection modes on steam displacement are contrasted, the mechanism of nitrogen-assisted steam stimulation is clarified, which includes: ①heat carrying capacity is raised, the saturation of remaining oil is reduced after nitrogen-assisted injection is made; ②crude oil flow is enhanced because of nitrogen compression and dispersion and the change of oil flow shape; ③water back-production rate is improved by expanding the steam sweep volume and compensating in-situ energy; ④ steam distillation effect is enhanced.
10.The conditions of hydrolytic pretreatment of rose by beta-glucosidase were investigated. Theamount of beta-glucosidase and water added were respectively 30IU/g dried flower and 6mL/gdried flower, and the materials were hydrolyzed at 40℃ for 24h with the agitation of 150r/min,then followed by steam distillation for 120min.
