Kjeldahl Catalysts for Nitrogen Detections
The Kjeldahl method has been used to determine the nitrogen content of organic and inorganic substances for over 120 years. Its universality, precision, and reproducibility have made it the internationally-recognized method for ascertaining the level of protein in foods. Furthermore, this method is also employed in environmental analysis and the agricultural industry for determining nitrates and ammonium. There have been many advances in technique and devices over the years, but the basic principles are still applied in the food and drinks industry , in laboratories, and in quality control everywhere. The method works by converting nitrogen compounds (proteins, amines or organic compounds) into ammonia compounds. By adding caustics, free ammonia is released, which is then expulsed by distillation and titrated. Analysts use the result of this process to easily calculate the concentration of nitrogen (= proteins) in the sample.
A mixed catalyst containing copper and titanium will usually be best for your needs, depending on your priority: