Now, in general, the produce of antibiotic is firstly extracted by clarification and solvent, and is separated from fermentation liquid and at last do the vacuum evaporation of the liquid extraction.
现代抗生素的生产一般首先是通过澄清和溶剂萃取从发酵液中加以分离，在对萃取液进行真空蒸发制得。
2
Three new methods of preparing samples were reviewed, including solid phase microextraction (SPME), extraction with supercritical CO2 fluid and solvent assisted flavor evaporation (SAFE).