The sample, after being purged by reversed extraction and purified byPVP - kieselguhr column, was enriched through Amberlite XAD - 7 column.样品经过乙酸乙酯反萃取及PVP - 硅藻土层析柱后, 再径XAD - 7柱浓缩....
我下决心有些慢。I've been a bit slow in making up my mind.我正下决心准备去拜访时，西蒙来了。I was steeling myself to call round when Simon arrived.机不可失，下决心吧。It's now or never, so make up your mind....
海泡石是一种纤维状含水的镁硅酸盐矿石,具有良好的吸附性能.Sepiolite is a fibrous natural hydrated magnesium silicate with good absorptive property.结果表明,水解产物为含水的锐钛矿型二氧化钛.Experimental results indicated that the product of hydrolysis was anatase - TiO ...