Within 24 hours
24-hour urine. Refrigerate during collection. Also acceptable: Random urine.
Adjust pH to less than or equal to 2 by adding 6M HCl. Transfer a 4 mL aliquot of urine to an ARUP Standard Transport Tube. (Min: 0.5 mL) Record total volume, collection time interval, and pH on transport tube and test request form. Also acceptable: Specimens previously preserved with boric acid.
Ambient: 8 hours; Refrigerated: 1 week; Frozen: Indefinitely
|Citric Acid, Urine - per 24h||18 years and older: 320-1240 mg/d|
|Citric Acid/Creatinine Ratio, Urine||1 year and older: greater than or equal to 150 mg/g.|
Per 24h calculations are provided to aid interpretation for collections with a duration of 24 hours and an average daily urine volume. For specimens with notable deviations in collection time or volume, ratios of analytes to a corresponding urine creatinine concentration may assist in result interpretation.
This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the US Food and Drug Administration. This test was performed in a CLIA certified laboratory and is intended for clinical purposes.
Laboratory Developed Test (LDT)
|Component Test Code*||Component Chart Name||LOINC|
|0020207||Creatinine, Urine - per volume||2161-8|
|0020208||Creatinine, Urine - per 24h||2162-6|
|0020242||Citric Acid, Urine - per 24h||6687-8|
|0020243||Citric Acid, Urine - per volume||2128-7|
|0020744||Citric Acid/Creatinine Ratio, Urine||13722-4|
- Citric Acid, Random Urine
- Citric Acid, Urine
- Citric Acid/Creatinine Ratio, Random Urine
- Urinary Citrate Excretion