Simultaneous determination of phenylalanine and tyrosine in peripheral capillary blood by HPLC with ultraviolet detection.
Clin Biochem
; 46(12): 1074-1078, 2013 Aug.
Article
de En
| MEDLINE
| ID: mdl-23711957
ABSTRACT
OBJECTIVES:
Phenylalanine (Phe) and tyrosine (Tyr) are the most reliable indicators for the diagnosis of phenylketonuria (PKU). The purpose of this study is to establish a simple and rapid method for the determination of Phe and Tyr in peripheral capillary blood from newborns and children by high performance liquid chromatography with ultraviolet detection (HPLC-UV).METHODS:
Peripheral blood specimens were taken from newborns or children by heel stick or skin puncture on the fingers. Blood samples were deproteinized by equal volume of 5% perchloric acid. Amino acid separation was carried out on a Hypersil C8 column. The mobile phase containing 5% acetonitrile (v/v) was run at a flow rate of 1.5 mL/min. Phe and Tyr were determined in the ultraviolet detector at 210 nm.RESULTS:
The determination was within 10.0 min. The linear range was from 6.0 to 1512.0 µmol/L for Phe and 5.5 to 1250.0 µmol/L for Tyr. Although Phe and Tyr levels from peripheral blood samples were relatively lower than those from serum or plasma, the data showed a good agreement between them.CONCLUSION:
The method we developed is simple, rapid and convenient. It is useful for screening and diagnosis of PKU in newborns and children.Mots clés
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Phénylalanine
/
Tyrosine
/
Rayons ultraviolets
/
Chromatographie en phase liquide à haute performance
Type d'étude:
Diagnostic_studies
Limites:
Child
/
Child, preschool
/
Female
/
Humans
/
Infant
/
Male
/
Newborn
Langue:
En
Journal:
Clin Biochem
Année:
2013
Type de document:
Article