Calcium, Random Urine

Methodology: 
This calcium procedure is based on calcium ions (Ca2+) reacting with Arsenazo III (2,2’-[1,8-Dihydroxy-3,6-disulphonaphthylene-2,7-bisazo]- bisbenzenear-sonic acid) to form an intense purple-colored complex.2,3 Magnesium does not significantly interfere in calcium determination using Arsenazo III. In this method the absorbance of the Ca-Arsenazo III complex is measured bichromatically at 660/700 nm. The resulting increase in absorbance of the reaction mixture is directly proportional to the calcium concentration in the sample. (Package Insert: OSR General Chemistry BAOSR6x117.05, 2014‐04)
Performed: 
Monday - Friday
Reported: 
Within 24 hours
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
Reference Values: 
No reference range established
CPT Code (s): 

82340

Notes: 

UFHPL Test #: 20087

UFHPL Epic order code: LAB371

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