Determination of stable isotopic enrichment in individual plasma amino acids by chemical ionization mass spectrometry

1979 ◽  
Vol 51 (1) ◽  
pp. 80-84 ◽  
Author(s):  
D. E. Matthews ◽  
E. Ben-Galim ◽  
D. M. Bier
Keyword(s):  
Mass Spectrometry ◽  
Amino Acids ◽  
Chemical Ionization ◽  
Ionization Mass Spectrometry ◽  
Chemical Ionization Mass Spectrometry ◽  
Ionization Mass ◽  
Plasma Amino Acids ◽  
Isotopic Enrichment ◽  
Stable Isotopic

Determination of histamine by chemical ionization mass spectrometry: Application to human urine

1983 ◽  
Vol 10 (8) ◽  
pp. 480-484 ◽  
Author(s):  
J. J. Keyzer ◽  
H. Breukelman ◽  
H. Elzinga ◽  
B. J. Koopman ◽  
B. G. Wolthers ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Human Urine ◽  
Chemical Ionization ◽  
Ionization Mass Spectrometry ◽  
Chemical Ionization Mass Spectrometry ◽  
Ionization Mass ◽  
Mass Spectrometry Application

Radioimmunoassay and chemical ionization/mass spectrometry compared for plasma cortisol determination.

1982 ◽  
Vol 28 (1) ◽  
pp. 174-177 ◽  
Author(s):  
C Lindberg ◽  
S Jönsson ◽  
P Hedner ◽  
A Gustafsson
Keyword(s):  
Mass Spectrometry ◽  
New England ◽  
Plasma Cortisol ◽  
Chemical Ionization ◽  
Internal Standard ◽  
Ionization Mass Spectrometry ◽  
Chemical Ionization Mass Spectrometry ◽  
Ionization Mass ◽  
Plasma Samples

Abstract We describe a method for determination of cortisol in plasma and urine, based on chemical ionization/mass spectrometry with deuterium-labeled cortisol as the internal standard. The within-run precision (CV) was 2.5-5.7%, the between-run precision 4.6%. Results by this method were compared with those by a radioimmunological method (RIANEN Cortisol, New England Nuclear) for 395 plasma samples. The latter method gave significantly higher (approx. 25%) cortisol values.

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