Gas chromatography-mass spectrometry of nortriptyline in body fluids of man

1971 ◽  
Vol 12 (3) ◽  
pp. 496-505 ◽  
Author(s):  
Carl-Gustaf Hammar ◽  
Balzar Alexanderson ◽  
Bo Holmstedt ◽  
Folke Sjôqvist
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Body Fluids ◽  
Gas Chromatography Mass Spectrometry ◽  
Chromatography Mass Spectrometry

scholarly journals Levels of pyrroloquinoline quinone in various foods

1995 ◽  
Vol 307 (2) ◽  
pp. 331-333 ◽  
Author(s):  
T Kumazawa ◽  
K Sato ◽  
H Seno ◽  
A Ishii ◽  
O Suzuki
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Internal Standard ◽  
Pyrroloquinoline Quinone ◽  
Body Fluids ◽  
Gas Chromatography Mass Spectrometry ◽  
Human Tissues ◽  
Selected Ion Monitoring ◽  
Chromatography Mass Spectrometry

The levels of free pyrroloquinoline quinone (PQQ) in various foods were examined by the use of gas chromatography-mass spectrometry. PQQ was extracted from the samples, after addition of [U-13C]PQQ as internal standard, with n-butanol and Sep-Pak C18 cartridges. After derivatization of PQQ with phenyltrimethylammonium hydroxide, molecular peaks at m/z 448 and 462 were used for detection of PQQ and [U-13C]PQQ respectively, by selected ion monitoring. Free PQQ could be detected in every sample in the range 3.7-61 ng/g or ng/ml. Since its levels in human tissues and body fluids are 5-10 times lower than those found in foods, it is probable that PQQ existing in human tissues is derived, at least partly, from the diet.

scholarly journals Determination of ifenprodil in body fluids by gas chromatography/mass spectrometry.

1986 ◽  
Vol 35 (3) ◽  
pp. 293-297
Author(s):  
Tomiharu ITO ◽  
Masahiro ABE ◽  
Fumihiko IMAMURA ◽  
Yasuhiko MATSUKI ◽  
Toshio NAMBARA
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Body Fluids ◽  
Gas Chromatography Mass Spectrometry ◽  
Chromatography Mass Spectrometry
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