So the mixed indicator of phenolphthalein with alizarin red-methyl red could be used as the new indicator for the alkalify water determination.

采用百里-红、溴绿-基红混和指示剂的测试效较差。

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.

采用精制棉经过碱化、醚化得到高取取基均匀分布的聚阴离子纤维素产品。