Table 5.

Responses of HCl-CA acidified canine blood to added base solutions: dependence on mixing ratio of NaHCO₃ and Na₂CO₃ at fixed 150 mM carbonate concentration.

Added solution	Conc. (mM)	pH	PCO2 (mm Hg)	[${\text{HCO}}_3^{-}$] (mM)	[Na+] (mM)	[K+] (mM)	[Cl−] (mM)
None	0	6.66	115	11.9	130	3.0	95
Na2CO3	150	7.39	47	26.2	152	2.5	99
NaHCO3   Na2CO3	25 125	7.31	60	27.4	152	3.6	99
NaHCO3   Na2CO3	37.5 112.5	7.20	73	26.4	150	4.3	99
NaHCO3   Na2CO3	75 75	7.04	101	25.2	145	5.6	98
NaHCO3	150	6.86	135	22.6	136	2.6	93
NaOH   NaCl	150 75	7.33	21	10.1	143	2.6	100
Tris soln   NaCl	150 75	7.24	28	11.0	131	2.6	100
Tris buffer	150	6.96	42	8.8	122	2.7	98

(1 part solution: 9 parts HCl-CA-K9-3): see also Figure 7 for plot of top panel. Lower panel: responses caused by adding other non-carbonate base solutions.