BH GSO ISO 3360:2017 Phosphoric acid and sodium phosphates for industrial use (including foodstuffs) -- Determination of fluorine content -- Alizarin complexone and lanthanum nitrate photometric method
1970BH GSO ISO 3360:2017 Phosphoric acid and sodium phosphates for industrial use (including foodstuffs) -- Determination of fluorine content -- Alizarin complexone and lanthanum nitrate photometric method