Determination of Norepinephrine in Microdialysis Samples by Microbore Column Liquid Chromatography with Fluorescence Detection Following Derivatization with Benzylamine

1999 ◽  
Vol 270 (2) ◽  
pp. 296-302 ◽  
Author(s):  
Masatoshi Yamaguchi ◽  
Takashi Yoshitake ◽  
Kaoru Fujino ◽  
Ken Kawano ◽  
Jan Kehr ◽  
...  
Keyword(s):  
Column Liquid Chromatography ◽  
Liquid Chromatography ◽  
Fluorescence Detection ◽  
Microbore Column

Determination of five beta-blockers in wastewaters by coupled-column liquid chromatography and fluorescence detection

2010 ◽  
Vol 666 (1-2) ◽  
pp. 38-44 ◽  
Author(s):  
P. Parrilla Vázquez ◽  
M. Martínez Galera ◽  
A. Serrano Guirado ◽  
M.M. Parrilla Vázquez
Keyword(s):  
Column Liquid Chromatography ◽  
Liquid Chromatography ◽  
Fluorescence Detection ◽  
Beta Blockers

scholarly journals Simultaneous Determination of Aflatoxins, Ochratoxin A, and Zearalenone in Grains by New Immunoaffinity Column/Liquid Chromatography

2004 ◽  
Vol 87 (2) ◽  
pp. 411-416 ◽  
Author(s):  
Roswitha Göbel ◽  
Klaus Lusky
Keyword(s):  
Column Liquid Chromatography ◽  
Liquid Chromatography ◽  
Simultaneous Determination ◽  
Ochratoxin A ◽  
Fluorescence Detection ◽  
Trifluoroacetic Acid ◽  
Detection Limits ◽  
Immunoaffinity Column ◽  
Recovery Rates

Abstract The simultaneous determination of mycotoxins was performed in 3 steps: extraction, cleanup, and detection. For extraction, a mixture of acetonitrile–water (60 + 40, v/v) was proved appropriate. For cleanup, a new Afla-Ochra-Zea immunoaffinity column was used. After derivatization with trifluoroacetic acid, the mycotoxins aflatoxins, ochratoxin A (OTA), and zearalenone (ZEA) were determined simultaneously by liquid chromatography with fluorescence detection. The detection limits in different matrixes after cleanup with the new immunoaffinity column were very low: aflatoxins, 0.002–0.7 μg/kg; OTA, 0.07–0.25 μg/kg; ZEA, 1–3 μg/kg. The limits of determination were: aflatoxins, 0.25 μg/kg; OTA, 0.5 μg/kg; ZEA, 5 μg/kg. The recovery rates for aflatoxins, OTA, and ZEA for rye and rice were between 86 and 93% when a 0.5 g sample matter per immunoaffinity column was used.

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