<prompt> Proper evaluation of serum calcium level requires estimation of:Serum potassiumSerum phosphorusSerum albuminUrinary output  <response>: Concentration of serum protein especially serum albumin is an impoant determinant of calcium ion concentration. Calcium is mostly bound to serum albumin. of protein bound calcium 0.8 x albumin gl 0.2 x globulin gll 3. This formula is used for calculation of calcium bound to proteins. A rough formula is to add 1 mgdl, to the serum calcium level for every l gdl, by which serum albumin level is below 4 gdL. 