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-甲基红混和指示剂的测试效果较差。

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.

采精制棉经过化、醚化得到高取代度且取代基均匀分布的聚阴离子纤维素产品。