| Methodology: |
Quantitative Ion-Selective Electrode
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| Performed: |
Sun-Sat
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| Reported: |
Within 24 hours
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| Specimen Required: |
Patient Prep: Patient should avoid exercise of arm or hand before and during collection.
Collect: Plasma separator tube or serum separator tube.
Specimen Preparation: Allow serum tube to clot completely at room temperature. Separate serum or plasma from cells within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.2 mL)
Storage/Transport Temperature: Refrigerated.
Unacceptable Conditions: Urine (refer to Potassium, Urine, ARUP test code 0020849). Specimens collected in citrate, EDTA, potassium oxalate, or sodium fluoride. Hemolyzed specimens.
Stability (collection to initiation of testing): After separation from cells: Ambient: 2 weeks; Refrigerated: 2 weeks; Frozen: 6 months
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