extraction n. 1.抽出,拔出。 2.【化學(xué)】提取(法);萃取(法);回收物,提出物;精煉。 3.精選,摘要。 4.血統(tǒng),家世,出身。 5.【數(shù)學(xué)】開方,求根。 spirit of the first extraction 原汁酒。 a man of foreign extraction 外國(血統(tǒng)的)人。 extractions from a book 一本書的內(nèi)容摘錄。 an extraction of 81 percent 百分之八十一的出粉率,八一粉。 the extraction of root 【數(shù)學(xué)】開方法,求根法。
Extraction mechanism of purple crystallize on the aqueous two - phase system of tetrabutylammonium bromide and 2so4 mixture 硫酸銨雙水相萃取法萃取結(jié)晶紫的行為研究
Au . the influence of several variables such as gold and cosolvent concentrations , shaking times , the ratio of tdmba and gold on the extraction of gold and the water concentration of the organic phase were studied . while the cosolvent ratio is more than 10 % , in the tdmba system , gold was extracted completely . the gold extraction mechanism was discussed on the bases of water concentrations of organic phases and infrared spectrum . it was found that the aggregation ratio of tdmba and au 等因素對萃取率的影響,并研究了有機(jī)相的連續(xù)萃取有機(jī)相金含量與水含量的關(guān)系。結(jié)果表明,助溶劑體積比10 %以上時(shí),十四烷基二甲基芐基氯化銨對金具有萃取能力強(qiáng),平衡時(shí)間短的特點(diǎn)。季銨鹽陽離子與au cn