Phosphorus, Inorganic – Random Urine

Additional Information:

UFHPL Epic order code: LAB2127

CPT Code(s):


Specimen Requirements:

Type: Urine, random

Container/Tube: Plastic urine container with no preservative

Sample Volume: 1 mL

Storage: Refrigerate specimens.

Specimen Retention Time: 5 days


This inorganic phosphorus method is based on a modification of the method developed by Daly and Ertingshausen in which inorganic phosphate reacts with molybdate to form a heteropoly acid complex. The use of a surfactant eliminates the need to prepare a protein-free filtrate. The absorbance at 340/380 nm is directly proportional to the inorganic phosphorus level in the sample. (Package insert, OSR General Chemistry BAOSR6x22.03, 2013-07)


Within 24 hours

Reference Values:

No reference range established