Parenteral Fluid composition

Solution	Na	K	Ca	Mg	Cl	HCO3
ECF	142	4	5	3	103	27
NS	154				154
RL	130	4	2.7		109	28
D5/0.45%NS	77				77
2/3 & 1/3	56				56

Osmolarity:
Ringer's: 275 mmol/L
Normal saline: 310 mmol/L
Plasma normal range: 300-310 mmol/L

pH:
Ringer's: 6.75
Normal saline: 5.5