Related Experiment Video
Updated: Jun 28, 2026

Measuring Nitrite and Nitrate, Metabolites in the Nitric Oxide Pathway, in Biological Materials using the Chemiluminescence Method
Published on: December 25, 2016
Microdetermination of nitrates and nitrites-III Gasometric and gravimetric methods based on reduction with formic
W I Awad1, S S Hassan, M T Zaki
1Research Microanalytical Laboratories, Chemistry Department, Faculty of Science, Ain Shams University, Cairo, U.A.R.
Abstract:
Simple microgasometric and gravimetric methods for the determination of the nitrate and nitrite groups are described. These are based on reduction with formic acid whereby one mole of nitrous oxide and four moles of carbon dioxide are simultaneously liberated per two moles of nitrate; two moles of nitrous oxide and six moles of carbon dioxide are liberated per seven moles of nitrite. Nitrous oxide is measured gasometrically and carbon dioxide gravimetrically. Results accurate to +/- 0.2% absolute are obtained for both nitrate and nitrite.
More Related Videos
Related Concept Videos
Precipitation Gravimetry
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
2° Amines to N-Nitrosamines: Reaction with NaNO2
Preparation of Amines: Reduction of Oximes and Nitro Compounds
Though catalytic hydrogenation can reduce nitrobenzenes, the reduction is nonselective in the presence of other functional groups. For instance, if nitrobenzene contains an aldehyde group,...
Titrimetric Methods: Types and Commonly Used Strategies
Gravimetry: Overview
In precipitation gravimetry, the analyte is converted into a precipitate and weighed. For example, the silver content in a sample can be estimated by precipitating and...
Precipitation Titration: Endpoint Detection Methods
In the Volhard method, a standard excess of AgNO3 is first added to the...

