Reference Values

Sodium
0-6 days: 133-146 mmol/L
7-30 days: 134-144 mmol/L
31-182 days: 134-142 mmol/L
183-365 days: 133-142 mmol/L
1+ years: 135-145 mmol/L
 
Potassium
0-7 days: 3.2-5.5 mmol/L
8-30 days: 3.4-6.0 mmol/L
31-182 days: 3.5-5.6 mmol/L
183-365 days: 3.5-6.1 mmol/L
1-17 years: 3.3-4.6 mmol/L
18+ years: 3.5-5.0 mmol/L
 
Chloride
0-365 days: 98-113 mmol/L
1-17 years: 102-112 mmol/L
18+: 98-108 mmol/L
 
Carbon Dioxide
0-2 years: 13-29 mmol/L
3+ years: 21-31 mmol/L

Anion Gap
7-17 mmol/L