Table 1.

pH and ionic concentration in different physiological fluids.

Physiological fluid	Volume (l)	pH	[Na+] (mEq/l)	[K+] (mEq/l)	[Cl-] (mEq/l)	[HCO3-] (mEq/l)
Saliva	1.5	6.0 – 7.0	30	20	30	15
Gastric fluid	2.5	1.0 – 3.5 (fasting)	50 (H+, 90)	10	110	0
Bile	0.5	7.8	140	5	105	40
Pancreatic fluid	0.7	8.0 – 8.3	140	5	60	90
Small-intestinal fluid	1.5	7.5 – 8.0	120	5	110	35
Large-intestinal fluid	1.0 – 1.5	5.5 – 7.0	130	10	95	20
Plasma	3.0	7.4	140	5	100	30
Interstitial fluid	10.0	-	150	5	110	30
Intracellular fluid	30.0	-	10	160	115	30