Department

Biochemistry

2mL

Sample Processing in Laboratory

First class post. (Transport frozen)

Sample Preparation

The sample must be collected into a clean universal bottle with 25mg ascorbic acid added and kept dark. Freeze sample.

Turnaround Time

4 weeks

Sample Stability

-20 ºC and protect from light

Pterin (urine) (Also known as Biopterin)

Patient Preparation

Samples must be collected at a early clinic visit when phenylalanine levels are at their highest and this level must be recorded and written on the request card.

Notes

For the investigation of hyperphenylalaninaemia. NB. This assay will not differentiate between classical PKU and DHPR deficiency as the pterin levels can be similar.

Reference Range

Age dependent reference ranges provided by reference laboratory.

Specifications

EQA Status: NULL

Link to Send Away Laboratory

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