ARUP's Laboratory Test Directory

Electrolytes, Urine : 0020498

Mnemonic: ULYTE

Methodology: Quantitative Ion-Selective Electrode
Performed: Sun-Sat
Reported: Within 24 hours
Specimen Required: Collect: 24-hour or random urine. Refrigerate during collection.

Specimen Preparation: Do not adjust specimen pH. Transfer a 1 mL aliquot of urine from a well-mixed collection to an ARUP Standard Transport Tube. (Min: 0.5 mL) Record total volume and collection time interval on transport tube and test request form.

Storage/Transport Temperature: Refrigerated.

Stability (collection to initiation of testing): Ambient: 8 hours; Refrigerated: 1 week; Frozen: 3 months
Reference Interval:
 
Test Number Components Reference Interval
 Sodium, Urine 51-286 mmol/day
 Potassium, Urine 25-125 mmol/day
 Chloride, Urine 140-250 mmol/day
 Creatinine, Urine - per 24h  
 
Age Male Female
3-8 years 140-700 mg/d 140-700 mg/d
9-12 years 300-1300 mg/d 300-1300 mg/d
13-17 years 500-2300 mg/d 400-1600 mg/d
18-50 years 1000-2500 mg/d 700-1600 mg/d
51-80 years 800-2100 mg/d 500-1400 mg/d
81 years and older 600-2000 mg/d 400-1300 mg/d

Note: Reference intervals are not established for random urines.
CPT Code(s): 82436; 84133; 84300