DIC‑d13C in seawater

Apollo acidification system coupled to a Picarro G2201-i analyzer

Dissolved Inorganic Carbon - δ13C  


Four ml of sample is transferred to a cooled chamber where phosphoric acid is added for transformation of dissolved inorganic carbon to CO2 gas, which is then sparged and sent to the Picarro analyzer for analysis of carbon isotopic composition (d13C) as well as quantitative determination of dissolved inorganic carbon (DIC (uM.l-1)).


Cheng, L., Normandeau, C., Bowden, R., Doucett, R., Gallagher, B., Gillikin, D.P., Kumamoto, Y., McKay, J.L., Middlestead, P., Ninnemann, U., Nothaft, D., Dubinina, E.O., Quay, P., Reverdin, G., Shirai, K., Mørkved, P.T., Theiling, B.P., van Geldern, R., and Wallace, D.W.R. (2019) An international intercomparison of stable carbon isotope composition measurements of dissolved inorganic carbon in seawater. Limnology and Oceanography: Methods. https://doi.org/10.1002/lom3.10300