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  • Title: Spectrophotometric determination of serum nitrite and nitrate by copper-cadmium alloy.
    Author: Sastry KV, Moudgal RP, Mohan J, Tyagi JS, Rao GS.
    Journal: Anal Biochem; 2002 Jul 01; 306(1):79-82. PubMed ID: 12069417.
    Abstract:
    A macro and micro assay for the spectrophotometric determination of serum nitrite and nitrate was developed. Nitrite/nitrate in biological samples can be estimated in a single step by this method. The principle of the assay is the reduction of nitrate by copper-cadmium alloy, followed by color development with Griess reagent (sulfanilamide and N-naphthylethylenediamine) in acidic medium. This assay is sensitive to 1 microM nitrate and is suitable for different biological fluids, including sera with a high lipid concentration. The copper-cadmium alloy used in the present method is easy to prepare and can completely reduce nitrate to nitrite in an hour. The present method provides a simple, cost-effective assay for the estimation of stable oxidation products of nitric oxide in biological samples.
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