GB/T 7482-1987 《Water quality--Determination of fluoride--Visual colorimetry with zirconium alizarinsulfonate》 Related products

This standard specifies the visual determination of fluoride in drinking water, surface water, groundwater and wastewater using zirconium alizisulfonate Colorimetry. The minimum detection concentration of this method is 0.05mg/L, and the upper limit of detection is 2.5mg/L. Pre-distillation is required when the interfering ions in the sample exceed a certain concentration. The determination is based on the color change of the fluoride ion and zirconium alizisulfonate complex, and the fluoride content is determined by visual Colorimetry.