This standard describes a specific method for the determination of water-soluble anions in graphene powders using Ion chromatography. Applicable anions include fluorine ions (F), chloride ions (Cl), nitrite ions (NO ²), bromine ions (Br), nitrate ions (NO ²), sulfate ions (SO²) and phosphoric acid ions (PO ³). Miscellaneous water-soluble anions can also be determined with reference to this method. The anion in the sample was extracted by a suitable solvent, separated by a Chromatography Column, and then the conductivity of the anion component was determined by a Conductivity Detector with an suppressor, qualitatively according to the relative Retention time of the standard solution, and quantitatively analyzed by a standard Linear dispersion method.