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

1.采用蓝-甲红、溴甲绿-甲红混和指示剂的测试效较差。

2.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.

2.采用精制棉经过碱化、醚化得到高度且均匀分布的聚阴离子纤维素产品。