Acid-Labile Carbon Dioxide in Muscle: Its Nature and Relationship to Intracellular pH.

Abstract
A portion of the acid-labile CO2 in alkaline extracts of rat muscle was not precipitable by BaCl2. Carbonate added to an extract that was acidified, freed of CO2 by evacuation, and realkalinized was only partially precipitated. Barium solubility is the effect of some substance in inhibiting crystallization. Calculation of intracellular pH from total acid-labile CO2 appears valid.