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- W1981194789 abstract "The variation with pH and temperature of the apparent first dissociation constant of carbonic acid in plasma has been studied using normal human plasma. A new tonometry set-up was used for equilibrating plasma with mixtures of carbon dioxide and oxygen, CO2 concentration 2–16%, at 42.5, 37.5, 35.0, 32.5, 30.0, 26.0, 20.0 and 16.0°. Total carbon dioxide concentration in plasma was measured by means of the cediometer, plasma pH and CO2 concentration of tonometry gas was measured using standard methods. The dissociation constant calculated from these measurements is denoted by the symbol pK̃′1. A total of 555 pK̃′1 determinations have been performed in duplicate, the reproducibility being 0.008 (s.d.). pK̃/t1 can be described as a function of pH and temperature by means of the equation pK̃′1 = −47416+1840.141T+0.15906T−log(1+0.02068210−pH+7) The agreement between experimentally determined and calculated pK̃′1 values is within 0.01379 (s.d.). The abnormal values of pK̃′1 recently reported for seriously ill patients, found when using CO2 electrodes for measuring blood PCO2, are discussed and supposed to be caused by errors in the determination of pH, PCO2 or [HCO3−]." @default.
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- W1981194789 date "1968-12-01" @default.
- W1981194789 modified "2023-09-29" @default.
- W1981194789 title "The apparent first dissociation constant of carbonic acid in plasma between 16 and 42.5°" @default.
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- W1981194789 doi "https://doi.org/10.1016/0009-8981(68)90113-7" @default.
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