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Carbon Dioxide (dissolved) Test Kits

Carbon Dioxide (dissolved) Test Kits

Click on a catalog number in the tables below for more information or to purchase a test kit.

Visual Kits

Range MDL Method Kit Catalog No. Refill Catalog No.
10-100 ppm 10 ppm Caustic Titrant with pH Indicator K-1910
100-1000 ppm 100 ppm Caustic Titrant with pH Indicator K-1920
250-2500 ppm 250 ppm Caustic Titrant with pH Indicator K-1925


Dissolved carbon dioxide (CO2) is naturally present as a result of animal respiration, the decay of organic matter, and the decomposition of certain minerals. It is the major source of acidity in unpolluted water samples. Surface waters typically contain less than 10 ppm (mg/L) dissolved CO2, while ground waters, particularly if deep, may contain several hundred ppm (mg/L).

The Caustic Titrant with pH Indicator Method

References: APHA Standard Methods, 23rd ed., Method 4500-COC-2004. ASTM D 513-82, Total and Dissolved Carbon Dioxide in Water, Test Method E. 
CHEMetrics’ dissolved carbon dioxide (CO2) in water test kits employ a sodium hydroxide titrant and phenolphthalein indicator. Results are expressed as ppm (mg/L) CO2.