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slyang8682铜虫 (初入文坛)
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【求助】透析实验怎么做？
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150ml of the nanoribbon solution was covered by a 5-mm layer of silicon oil in an Erlenmeyer flask. To this solution we added 150ml of concentrated NH4OH (2.22mmol), followed by 150ml of N2H4.H2O(98%,3.03mmol). The oil was added to eliminate the air–water interface that causes agglomeration of the reduced ribbons as water evaporates. The reaction mixture was heated at 95C for 1h in a gently boiling wate rbath (nostirring) .Excess N2H4 was removed by dialysis (CelluSep H1 regenerated cellulose tubular membrane; nominal molecular weight, 5,000 (relative molecular mass); 400-mm width) for 24h in 1% NH4OH. Filtering and drying in vacuo afforded 23.2mg of reduced nanoribbons. 请问各位大侠Excess N2H4 was removed by dialysis (CelluSep H1 regenerated cellulose tubular membrane;nominal molecular weight, 5,000 (relative molecular mass); 400-mm width) for 24h in 1% NH4OH. 所说的透析具体是怎么做的，具体用的是什么膜，都要什么设备。鄙人不是学化学的，什么都不会。谢谢！ |
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