Separation and detection of peroxynitrite using microchip electrophoresis with amperometric detection.
Anal Chem
; 82(5): 1608-11, 2010 Mar 01.
Article
em En
| MEDLINE
| ID: mdl-20143890
ABSTRACT
Peroxynitrite (ONOO(-)) is a highly reactive species implicated in the pathology of several cardiovascular and neurodegenerative diseases. It is generated in vivo by the diffusion-limited reaction of nitric oxide (NO(*)) and superoxide anion ((*)O(2)(-)) and is known to be produced during periods of inflammation. Detection of ONOO(-) is made difficult by its short half-life under physiological conditions (approximately 1 s). Here we report a method for the separation and detection of ONOO(-) from other electroactive species utilizing a microchip electrophoresis device incorporating an amperometric detection scheme. Microchip electrophoresis permits shorter separation times (approximately 25 s for ONOO(-)) and higher temporal resolution than conventional capillary electrophoresis (several minutes). This faster analysis allows ONOO(-) to be detected before substantial degradation occurs, and the increased temporal resolution permits more accurate tracking of dynamic changes in chemical systems.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Ácido Peroxinitroso
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Eletroforese em Microchip
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Eletroquímica
Idioma:
En
Ano de publicação:
2010
Tipo de documento:
Article