NS (NaCl 0.9%)
0.9% = 0.9 g NaCl per 100 mL
Molecular weight: Na = 23; Cl = 35.5; NaCl = 58.5
So sodium fraction: 23/58.5 = 0.39
1L NS has 0.39% of Na = 3.54g
LR
Total amount Na⁺ = 130 mEq/L
1 mEq Na = 23 mg
130 mEq/L x 23 = 3000 mg
1L LR has 0.30% Na = 3.0g
Summary
In sum, 1L
NS has 3.54g Na
LR has 3.0g Na
AHA recommendation
< 2300 mg sodium/day
Ideal goal: 1500 mg/day for most adults
