GB/T 35925-2018 English PDF (GBT35925-2018)

This Standard specifies the ion chromatographic method for the determination of impurity fluoride ion (F-) content in the water-soluble chemicals. This Standard is applicable to the determination of fluoride ion content in water-soluble chemicals with fluoride ion content 400mg/kg. In this Standard, the quantitative limit of organic chemicals is 0.02mg/kg; while the quantitative limit of inorganic chemicals is 4.0mg/kg. This Standard is not applicable to the insoluble chemicals and the chemicals with main component containing fluorine.