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HelpTest Code ALP Alkaline Phosphatase
Laboratory Code
LAB112
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 | 7 days |
Methodology
Enzymatic Assay
Days and Times Performed
24 hrs, TAT 1 day
Specimen Condition
| Gross Haemolysis | Alert/Reject |
|---|---|
| Icterus | OK |
| Lipaemia | OK |
| Others | Not applicable |
Reference Interval
| Age | Male (U/L) | Female (U/L) |
|---|---|---|
| 0 to < 15 days | 90 – 273 | 90 – 273 |
| 15 days to <1 yr | 134 – 518 | 134 – 518 |
| 1 yr to < 3 yrs | 156 – 369 | 156 – 369 |
| 3 to < 6 yrs | 144 – 327 | 144 – 327 |
| 6 to < 11 yrs | 153 – 367 | 153 – 367 |
| 11 to < 16 yrs | 113 – 438 | 64 – 359 |
| 16 to < 30 yrs | – | 44 – 107 |
| 16 to < 22 yrs | 56 – 167 | – |
| 30 to unspecified | – | 46 – 122 |
| 22 to unspecified | 50 – 116 | – |
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Assessment of liver profile.
Evaluation of metabolic bone disease.
Service Code
31018
LOINC Code Information
6768-6
Update
Last updated 10/03/2025