Compound Enzyme Assay
Diagnosis of renal tubule acidosis and some forms of calcium-dependent kidney stones.
Normal adult: greater than 200 mg/24 hrs (> 1058 uMol/24 hrs)
- Citric Acid
- CITRATE URINE 24 HOUR
Collect 24 hour urine specimen. Add 25 mL of 50% glacial acetic acid (15 mL for pediatric patients) to container prior to start of collection. Following collection, mix very well to dissolve any citrate crystals that may have formed, measure 24 hour urine volume, aliquot 20 mL into a plastic urine container and refrigerate. Record total 24 hour urine volume and collection dates/times on request form. Specimens with no preservative are also acceptable: send entire 24 hour collection to MLabs.