Osmometry of CO2 in gas samples

M. S. Oh, C. S. Kee, J. Uribarri, H. J. Carroll

Research output: Contribution to journalArticlepeer-review


Measurement of solute concentrations in biologic fluids by an osmometric technique has been described previously. Here, we describe an osmometric technique for measuring CO2 in gas samples. A solution of NaOH is injected into a graduated syringe containing the gas sample and CO2 is trapped in the reaction: 2NaOH + CO2 → Na2CO3 + H2O. The decrease in osmolality of the NaOH solution allows estimation of p(CO2) in the original gas sample.

Original languageEnglish
Pages (from-to)884-886
Number of pages3
JournalClinical Chemistry
Issue number5
StatePublished - 1983
Externally publishedYes


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