PHENYLALANINE/TYROSINE SERUM

Sample, Method, Reference values and Delivery Time Modification

Test code: 3329

Mnemonic code: CFTS

Effective update from 15/05/2023

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Sample:   Refrigerated serum   Method: Gas Chromatography – Flame Ionization Detector (GC-FID))     Reference Values: Phenylalanine: <24 Month        28-80 µmol/L 2-17 Years        30-95 µmol/L >=18 Years        35-80 µmol/L     Tyrosine <24 Month        26-115 µmol/L 2-17 Years        31-106 µmol/L >=18 Years        31-90 µmol/L       Phenylalanine/Tyrosine ratio: Less than 3      Delivery term: 7 days            Version of Test: 7

Sample: Frozen Plasma EDTA   Método: Liquid Chromatography/Tandem Mass Spectrometry (LC-MS/MS)   References Values: Phenylalanine: Premature         98–231 µmol/L 0 - 1 month          38–137 µmol/L 1 month - 2 years     31–75 µmol/L 2 - 18 month        26–91 µmol/L > 18 years          35–85 µmol/L   Tyrosine Premature         147–420 µmol/L 0 - 1 month          55–147 µmol/L 1 month - 2 years     22–108 µmol/L 2 - 18 years        24–115 µmol/L > 18 years          34–112 µmol/L   Phenylalanine/Tyrosine: Less than 3   Delivery term: 6 days            Version of Test: 8

 

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