Home
HelpTest Code K Potassium, serum
Laboratory Code
LAB114
Specimen Requirements
Submit only one of the following:
Preferred
Specimen Type: Serum
Container/Tube: Gold Top (SSTII)
Volume: 5.0 mL
Minimum Volume: 0.5 mL serum
Collection Instructions: Allow specimen to clot for 30 mins and centrifuge within 2 hrs.
Acceptable
Specimen Type: Plasma
Container/Tube: Green Top (Li Heparin/PST)
Volume: 4.5 mL
Minimum Volume: 0.5 mL plasma
Collection Instructions: Centrifuge within 2 hrs.
Specimen Stability
| Specimen Type | Serum / Plasma |
|---|---|
| Ambient | 7 days |
| Refrigerate | 7 days |
| Frozen | 1 year |
Methodology
Potentiometry
Days and Times Performed
24 hrs, TAT 1 day
Specimen Condition
| Haemolysis | Alert/Reject |
|---|---|
| Icterus | OK |
| Lipaemia | OK |
| Others | Not applicable |
Reference Interval
| 0 – < 1 mth | 3.6 – 6.0 mmol/L |
|---|---|
| 1 mth – < 1 yr | 3.6 – 5.8 mmol/L |
| 1 – 14 yrs | 3.5 – 5.5 mmol/L |
| ≥ 15 yrs | 3.5 – 5.2 mmol/L |
Critical value: <2.5 mmol/L or > 6.0 mmol/L
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Assessment of electrolyte balance.
Service Code
31112
LOINC Code Information
2823-3
Update
Last updated 012/03/2025