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Spectrophotometric Determination of Serum Nitrite and Nitrate by Copper–Cadmium Alloy

✍ Scribed by K.V.H. Sastry; R.P. Moudgal; J. Mohan; J.S. Tyagi; G.S. Rao

Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
49 KB
Volume
306
Category
Article
ISSN
0003-2697

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✦ Synopsis

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 M 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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