Kjeldahl Analysis
Kjeldahl nitrogen determinations are performed on a variety of food substances. The Kjeldahl method may be broken down into three main steps: digestion, distillation, and titration.
- Digestion: is accomplished by boiling a homogeneous sample in concentrated sulphuric acid. The end result is an ammonium sulphate solution.
- Distillation: excess base is added to the digestion product to convert the ammonium salt to ammonia.
- Titration: the amount of nitrogen in a sample can be calculated from the quantified amount of ammonia in the receiving solution. The ammonia is captured either with a carefully measured excess of a standardised acid solution (back titration) or a boric acid solution (direct titration
Product selection
Different heating systems with flexibility in volume and in the number of samples.
A variety of distillation systems available for all food lab applications.
From simple burettes to fully automated, programmable titration systems from Schott and Mettler.
Nitrogen-free filter paper and dedicated weighing boats for determination of nitrogen.