Carbon Dioxide (Dissolved), Titrets Titration Cells, CHEMetrics

Titrets® test kits use reverse titration to quantify concentrations in aqueous samples

After snapping the ampoule tip, the sample is drawn into the ampoule in small doses (with the Titrettor device included in each kit that precisely controls the sample) (Step 1), until a color change signals that the equivalence point has been reached (Step 2). The titration is stopped at the end point and the ampoule is held upright. The liquid level will correspond to a printed scale on the ampoule's outer surface (Step 3).

Carbon dioxide ends up in surface and ground water as a result of animal respiration, decaying organic matter, and the decomposition of some minerals. 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). Carbon dioxide concentration greatly impacts pH. In unpolluted waters, carbon dioxide is a major source of acidity.