PKU monitoring - phenylalanine and tyrosine

Description: 
Tandem mass spectrometric analysis
Clinical details: 
For monitoring patients with known inherited metabolic disease, specifically phenylketonuria and tyrosinaemia.
Related condition or disease: 
Phenylketonuria, tyrosinaemia
Reference range: 

Please contact laboratory to discuss

Synonyms or keywords: 
PKU, Phenylalanine, Tyrosine, Metabolic
Units: 
umol/L
Department: 
Reference Services
Location: 
Blackfriars Hub
Sample type and Volume required: 
Bloodspot card. Two spots > 7mm in diameter. Blood must be soaked through & not multi-spotted.
Turnaround time: 
Same day
Special sample instructions: 

Please include the clinical details with the request form for appropriate interpretation of results

Criteria for acceptance / rejections of sample
Storage and transport: 
Send via first class post
Contacts:
Inherited Metabolic Diseases Unit at Blackfriars Hub
020 7188 9652
Reference Chemistry, 1st Floor Blackfriars Hub
Friars Bridge Court
Blackfriars Road
London
SE1 8NZ

IMD Duty Biochemist: 07592 502653
For clinical advice or interpretation of results, please contact the laboratory in the first instance.
Laboratory: 
Inherited Metabolic Disease Laboratory at Blackfriars Hub

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Last updated: 30/01/2026