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HelpTest Code LAB6547 pH, Quantitative, Urine Random
Performing Laboratory
St. Louis Children's Hospital Laboratory - Chemistry
Specimen Requirements
Patient Preparation: None
Collection Container/Tube:
Preferred: Clean, plastic leak-proof, screw-cap urine collection container with no preservatives
Acceptable: Any clean, plastic collection container, no preservatives
Specimen Collection Volume: 1.0 mL (minimum 0.5 mL) urine
Submission Container/Tube: If specimen is coming from outside facility aliquot a minimum of 0.5 mL of urine into a plastic screw-capped tube for transport. Specimen should be placed on wet ice for transport due to specimen stability
Special Instructions: Send to lab immediately after collection. Place specimen in wet ice if unable to send to lab immediately (removing from wet ice to send thru pneumatic tube system).
Sample Rejection
Mislabled or unlabeled specimens
Logistics
Test Availability: Monday-Sunday
Cut-off time: None, performed as received
Turnaround Time: Same Day; 2 hours from receipt in performing lab
Reference Values
Reference Interval: No reference intervals established
Critical Value: None established
Methodology
Spectrophotometric reflection of light on color reagent pad
Limitations
- NA
Additional Information
FOR SLCH CORE LABORATORY USE ONLY
Lab Processing Instructions: DO NOT SPIN. Specimen should be given directly to urinalysis bench for testing
Processed Volume: minimum 0.5 mL urine
Analyte Stability:
| Specimen Type | Temperature | Time |
|---|---|---|
| urine (non-acidified) | Ambient | 2 hours |
| Refrigerated | 8 hours | |
| Frozen | not acceptable |
Test Classification and CPT Code
83986
LOINC
2756-5
Last Reviewed
10/2025