Alkaline Phosphatase
Investigation : Alkaline Phosphatase
Specimen type : Serum
Spec container : Serum Gel 
Volume required : 5 ml
Reference range : 30 - 130 U/l
Turnaround : <24 hours

Please note change to National Pathology Harmonisation reference range from 16th April 2012. (LWH locations with pregnant patients were excluded from the National Range - June 2014).
Prior to this date the reference range was 35 - 125 U/L

Age dependent reference range - higher values in childhood, pregnancy and old age.

Additional information on alkaline phosphatase and its clinical use can be found here: alkaline phosphatase.

AUH service users: new ALP reference interval 01/05/21, results unaffected.
ALP reference interval is for adults >18 years. For paediatrics, see CALIPER (


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