Table 4.

Body Sodium and Potassium Distribution.

	Plasma		Interstitium		Bone & Connective Tissue		Intracellular		Total	Exchangeable
	Content mEq/kg	Concentration mEq/kg H2O	Content mEq/kg	Concentration mEq/kg H2O	Content mEq/kg	Concentration mEq/kg H2O	Content mEq/kg	Concentration (mEq/kg H2O)	mEq/kg	(mEq/kg)
Na+	6	150	18	148.5	28(14)	400 (200)	2	6	54	40
K+	0.2	4.2	0.5	4	3.3	4.8	52.6 (49.3)	160 (150)	56.6	53.3

Values are estimates for average adult man. Parentheses indicate exchangeable cation opposed to total cation content and concentration. Adapted from references ^{2, 183, 14} and ¹⁸⁷.