Status : Published (Under review)

This standard was last reviewed and confirmed in 2022. Therefore this version remains current.
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Abstract

The method consists in extracting a test portion with hot water, precipitating the protein by addition of solutions of potassium hexacyanoferrate(II) and zinc acetate, and filtrating the precipitate. Further, reduction of the nitrate to nitrite by metallic cadmium (only for determining the nitrate). Then addition of sulfanilamide chloride and N-(1-naphtyl)ethylenediamine and measurement of the red complex obtained at a wavelength of 538 nm.

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General information

  • Status
     : Published
    Publication date
     : 1984-11
    Stage
    : International Standard confirmed [90.93]
  • Edition
     : 1
    Number of pages
     : 4
  • Technical Committee :
    ISO/TC 34/SC 3
    ICS :
    67.080.01 
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Life cycle

Sustainable Development Goals

This standard contributes to the following Sustainable Development Goals

12
Responsible Consumption and Production
3
Good Health and Well-being
2
Zero Hunger
13
Climate Action
15
Life on Land

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