How can Total Inorganic Carbon (TIC) be measured?

Document ID

Document ID TE104

Published Date

Published Date 25/01/2018
Question
How can Total Inorganic Carbon (TIC) be measured?
Summary
Measuring Total Inorganic Carbon (TIC) using an alkalinity method
Answer
Total Inorganic Carbon (TIC) is the sum of inorganic carbon species in a solution. The inorganic species include: carbon dioxide, carbonic acid, bicarbonate anion, and carbonate. The concentration of the different species depends on the pH of the solution (Bjerrum plot).

TIC is typically measured using infrared spectroscopy; however, if the dominant species is carbonate, the alkalinity titration methods can be used as an approximation. See the Water Analysis Handbook (WAH) alkalinity titration methods and, "Alkalinity Relationship" table.

Alkalinity, Phenopthalein and Total Method 8203
Alkalinity, Phenopthalein and Total Method 8221 BT