1.1 These test methods cover the measurement of total or dissolved carbon dioxide present as carbon dioxide (CO2), carbonic acid, bicarbonate ion, and carbonate ion in water:RangeSectionsTest Method A (Gas Sensing Electrode)2 to 800 mg/L8 to 15Test Method B (CO2 Evolution, Coulometric Titration)5 to 800 mg/L16 to 241.2 Carbon dioxide