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sltmac: ½ð±Ò+1 2012-06-05 09:50:47
This process needs to note the following:
   1, the first time amylopectin - (phenyl carbamate) THF solution was added to the aminopropyl silica gruel-like, magnetic stir just enough to free rotation, the first by adding too much can cause the coating uneven a magnetic stir bar to be solvent evaporation is not uniform mixing, again by adding a THF solution of branched-chain starch - (phenyl carbamate) was gruel-like amino silicone. This successive solution until end of the increase.
   2. Solution and after until the solvent evaporation resulting magnetic stir bar can not be stirred, medication spoon hand-squeeze (action, continuous extrusion, or agglomeration), the stationary phase until the solvent completely evaporate dry coating good was uniform and smooth sense of the original silica gel, particle sizes or sand a sense to be re-coated.
   3, re-coating First with isopropanol suspension, floating small particles (qualified) to be transferred to another beaker, and the remaining particulate matter to the appropriate heating (not overheating, keep stirring), the volatile contained isopropanol solvent until the solvent not completely volatile, there is still some moisture sense, adding a small amount of THF, showing thick can then manually squeeze, until the stationary phase particles dispersed. Isopropanol to re-suspension, qualified product suction, transfer the merged into the beaker. "
Amylopectin - (phenyl carbamate) using ATPC
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2Â¥2012-06-05 00:46:24
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3Â¥2012-06-05 07:25:23
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2Â¥: Originally posted by duzhichao at 2012-06-05 00:46:24
This process needs to note the following:
   1, the first time amylopectin - (phenyl carbamate) THF solution was added to the aminopropyl silica gruel-like, magnetic stir just enough to free rotatio ...

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