Ht concentration in body fluid ECF H+ MoVL p Arterial blood 4.0×1087.40±0.05 Ⅴ enous blood 4.5×1087.35 Interstitial fluid 4.5×10-87.35 Intracellular fluid 1.0 X10-6 6.0 t04.0×1087.4 Gastric fluid 0.9~1.8(3.0) Pancrea fluid 78~8.4ECF H+ mol/L pH Arterial blood 4.0 × 10-8 7.40 ± 0.05 Venous blood 4.5 × 10-8 7.35 Interstitial fluid 4.5 × 10-8 7.35 Intracellular fluid 1.0 × 10-6 6.0 to 4.0 × 10-8 7.4 Gastric fluid 0.9~1.8 (3.0) Pancrea fluid 7.8 ~ 8.4 H+ concentration in body fluid