[Simultaneous determination of tyrosine and tryptophan in amino acid injection, animal and plant extracts by polarization spectrofluorimetry].
Yao Xue Xue Bao
; 32(9): 695-8, 1997 Sep.
Article
em Zh
| MEDLINE
| ID: mdl-11596296
ABSTRACT
A new method for the simultaneous determination of tyrosine and tryptophan by polarization spectrofluorimetry has been developed. The interference of phenylalanine and light scattering of solvent were eliminated by using vertically crossed polarizers. The overlapping of fluorescence spectra of the two amino acids was solved with filters. The linear ranges of determination were 0.02-12.0 mg.L-1(tyrosine) and 0.01-2.50 mg.L-1(tryptophan). The mean recoveries of tyrosine and tryptophan in samples were 95.4% and 101.7% (in amino acid injection). 99.2% and 100.0% (in wild jujube kernel), 95.3% and 97.2% (in shrimp shell) respectively. The proposed method has been used to determine tyrosine and tryptophan in amino acid injection, extracts of wild jujube kernel and shrimp shells with satisfactory results.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Tirosina
/
Triptofano
/
Aminoácidos
Limite:
Animals
Idioma:
Zh
Revista:
Yao Xue Xue Bao
Ano de publicação:
1997
Tipo de documento:
Article