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Urinary NO2- and NO3- evaluation by an ion chromatography system
Biomedical Chromatography : BMC
|May 6, 1998
Summary
This study presents an ion chromatography method for accurately measuring urinary nitrite and nitrate, key indicators of nitric oxide production in the body. The system allows for evaluation of their proportions, aiding nitric oxide system research.
Area of Science:
- Analytical Chemistry
- Biochemistry
- Physiology
Background:
- Nitric oxide (NO) plays crucial roles in various physiological processes.
- Measuring NO production in vivo is essential for understanding its functions.
- Urinary nitrite (NO2-) and nitrate (NO3-) are reliable biomarkers of endogenous NO synthesis.
Purpose of the Study:
- To develop and validate an ion chromatography system for accurate quantification of urinary NO2- and NO3-.
- To establish a reliable method for assessing NO production in vivo.
- To provide tools for investigating the complex NO system.
Main Methods:
- Utilized an ion chromatography system with a Dionex AS4A-SC column.
- Employed a carbonate-bicarbonate buffer (1.8-1.7 mM) as the eluent.
- Applied the system for the evaluation of urinary NO2- and NO3- concentrations.
Main Results:
- The developed chromatographic system accurately measures urinary NO2- and NO3-.
- The method allows for the assessment of the relative proportions of nitrite and nitrate.
- The system provides a valuable tool for in vivo NO production evaluation.
Conclusions:
- The described ion chromatography system offers an accurate and reliable method for quantifying urinary NO2- and NO3-.
- This technique serves as an effective index for in vivo NO production.
- The system facilitates further research into the nitric oxide pathway and its physiological implications.