So the mixed indicator of phenolphthalein with alizarin red-methyl red could be used as the new indicator for the alkalify water determination.
采百里酚蓝-甲酚红、溴甲酚绿-甲基红混和指示试效果较差。
So the mixed indicator of phenolphthalein with alizarin red-methyl red could be used as the new indicator for the alkalify water determination.
采百里酚蓝-甲酚红、溴甲酚绿-甲基红混和指示试效果较差。
Polynionic celluloses were preparated by alkalify and etherify of refining cotton.The degree of replacement of the polynionic cellulosesis was high.The radicals of replacement were distributed evenly.
采精制棉经过碱、得到高取代度且取代基均匀分布聚阴离子纤维素产品。
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