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

采用百里蓝-红、溴-基红混和的试效果较差。

Alizarin complexone is obtained by the condensation of alizarin with formaldehyde solution and iminodiacetic acid in the presence of alkaline conditions.

茜素络合是在碱性条件下由茜素、醛和亚氨基二乙酸缩合而成。