Essential Biochemistry - Acid Base Balance (Section 1 - No. 4)
What does the anion gap measure?
The difference between the concentrations of sodium and chloride ions.
The difference between the measured cations and anions in the plasma.
The concentration of bicarbonate in the plasma.
The level of oxygen in the blood.
Paliwanag
The anion gap is the difference between measured cations (primarily sodium) and measured anions (chloride and bicarbonate).