Strong Ion Difference ([SID])
•
Strong electrolytes
•
– completely dissociated in H
2
O
•
•
[SID] =
å
[strong cations] –
å
[strong anions]
•
•
Measured [SID] = [Na
+
] + [K
+
] – [Cl
-
]
•
•
Determined by absorption from gut and removal by
kidneys
–
Affected by diet (DCAD)