The changes in pH, pCO2, pO2, BE, and SBC during storage of anaerobic drawn arterial blood for 24 hours at different temperatures were measured (Table Ia, Ib) and illustrated (Fig. 1). Correction tables (Table III) for determination of the initial acid-base data are constructed based upon the regression equations in Table II. The changes in the acid-base values of mink blood are much higher than in equine, porcine, and canine blood during storage at 21-24 degrees C and 0-4 degrees C for 24 hours.