What Is Kjeldahl Method?

The Kjeldahl method or Kjeldahl digestion in analytical chemistry is a method for the quantitative determination of nitrogen contained in organic substances plus the nitrogen contained in the inorganic compounds ammonia and ammonium.

What is Kjeldahl method formula?

So, the percentage of nitrogen can be determined using the following formula: Kjeldahl method of nitrogen estimation = 1.4V×NW. Where, W = Weight of the sample used (in grams)

How does Kjeldahl method determine nitrogen?

1. Digestion: In this method, a certain substance or sample is heated in the presence of sulphuric acid. The acid breaks down the organic substance via oxidation and reduced nitrogen in the form of ammonium sulphate is liberated. Potassium sulphate is usually added to increase the boiling point of the medium.