The result shows that, on over 2.5 times content of Daidzin in materials can be arrived with the hybrid extraction of acetone and ethyl acetate.
结果表明， 丙酮和乙酸乙酯的组合萃取可以将原料中大豆黄苷的含量提高2 .5倍以上。
2
Then, chose acetone, ethyl acetate, xylene and dimethylformamide according to solubility parameter close principle as solvents to dissolve coating finishing agents.
然后利用相似相溶原理选择了四种有机溶剂进行剥离实验：丙酮、二甲苯、二甲基甲酰胺及乙酸乙酯。
3
The compositions of grease were eluted with petroleum ether, benzene, chloroform, ethyl acetate, acetone, ethanol and characterized by means of IR and NMR spectroscopy.