This standard specifies the visual colorimetric method for the determination of fluoride in drinking water, surface water, ground water and waste water by zirconium alizarin sulfonate.
GB/T 7482-1987 history
1987GB/T 7482-1987 Water quality--Determination of fluoride--Visual colorimetry with zirconium alizarinsulfonate
GB/T 7482-1987 Water quality--Determination of fluoride--Visual colorimetry with zirconium alizarinsulfonate was changed to HJ 487-2009 Water quality.Determination of fluoride.Visual colormetry with zirconium alizarinsulfonate.