Determination of N,N',N"-triethylenthiophosphoramide in biological samples using capillary gas chromatography.
J Chromatogr B Biomed Sci Appl
; 698(1-2): 111-21, 1997 Sep 26.
Article
em En
| MEDLINE
| ID: mdl-9367199
ABSTRACT
A sensitive assay for the determination of N,N',N"-triethylenthiophosphoramide (thioTEPA) in microvolumes of human plasma and urine has been developed. ThioTEPA was analysed using gas chromatography with selective nitrogen-phosphorus detection, after extraction with ethyl acetate from the biological matrix. Diphenylamine is the internal standard. The limit of quantitation was 0.1 ng/ml, using only 100 microl of sample; recoveries ranged between 85 and 100% and both accuracy and precision were less than 10%. Using a flame ionisation nitrogen-phosphorus detector, the assay was not linear over the concentration range of 2-1000 ng/ml for plasma and 10-1000 ng/ml for urine. Linearity was accomplished in the range of 1-1000 ng/ml for plasma and urine when a thermionic nitrogen/phosphorous detector was used. The stability of thioTEPA in plasma proved to be satisfactory over a period of 3 months, when kept at -20 degrees C, whereas it was stable in urine for at least 1 month at -80 degrees C. ThioTEPA plasma concentrations of two patients treated with thioTEPA are presented demonstrating the applicability of the assay.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Tiotepa
/
Antineoplásicos Alquilantes
/
Cromatografia Gasosa-Espectrometria de Massas
Tipo de estudo:
Diagnostic_studies
Limite:
Humans
Idioma:
En
Revista:
J Chromatogr B Biomed Sci Appl
Assunto da revista:
QUIMICA CLINICA
Ano de publicação:
1997
Tipo de documento:
Article
País de afiliação:
Holanda