ISSN:
0306-042X
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
A gas chromatographic mass spectrometric method has been developed to determine tyrosine and deuterium labelled tyrosine in biological samples using α-methyltyrosine (α-Me Ty) or m-hydroxyphenylalanine as internal standards. With the latter standard both labelled and unlabelled tyrosine as well as α-Me Ty can be determined simultaneously, in for example human blood, following administration of α-Me Ty to inhibit catecholamine synthesis. After isolation of the amino acids on an ion exchange column (Amberlite IR 120) the butyl ester pentafluoropropionyl derivatives were prepared. In human plasma the precision of the method was determined at a level of 80 nmol tyrosine ml-1 and found to be ±5% (coefficient of variation, n = 10).
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/bms.1200060905
