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These questions will help you to understand the Dumas and Kjeldahl method

Complete the table below to get an overview of the characteristics of the Kjeldahl and Dumas method.

Sample digestion, neutralization and ammonium release, back titration of ammonium.

Combustion and reduction, nitrogen gas measured.

Applicable to all foods

Inexpensive

Included in methods approved by international organizations.

low analysis

Automation is possible.

Time consuming (at least 2 hour)

Use of toxic and expensive materials.

Interference by NPN fraction.

Only applicable to dry foods

Initial costs are high

interference by NPN fraction and inorganic N

Right!

Wrong