A VISUAL COLORIMETRIC REAGET FOR THE RAPID ESTIMATION OF FLUORIDE IN GROUND WATER IN THE FIELD

摘要

A visual colorimetric reagent comprising a mixture of 0.003 - 0.1 % by weight of metal salt capable of forming complex with fluoride 0.002 to 0.1 % by wt of an organic dye and 20-70 % by wt of acid selected from hydrochloric and perchloric acids.