It is the principle cation of the intracellular fluid.
Potassium
Elevated potassium levels — often associated with renal failure, dehydration shock of adrenal insufficiency.
Hyperkalemia
Decreased potassium level — associated with malnutrition, negative nitrogen balance, gastrointestinal fluid losses and hyperactivity of the adrenal cortex.
Hypokalemia
[2] Reagent contents of Potassium:
[Pr, Ps]
Potassium reagent: — content
Sodium Tetraphenylboron