Process and catalyst for determining nitrogen in a sample according to the Kjeldahl principle
AssigneeA/S N. Foss Electric
InventorsSteen R. Christoffersen, Ole-Christian Bjarno
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Abstract
An antimonate, such as potassium antimonate, is used as the destruction catalyst in nitrogen determinations according to the Kjeldahl principle. Preferred catalyst comprises potassium antimonate together with potassium sulfate (for increasing the boiling point of the destruction mixture) and minor amounts of zinc sulfate and cupric sulfate (as co-catalysts).
Claims17
A process for determining nitrogen in a sample according to the Kjeldahl principle, comprising catalyzing the sample destruction with an antimonate.
A catalyst for use in Kjeldahl type destructions comprising tablets of a potassium antimonate together with a salt selected from the group consisting of sodium sulfate and potassium sulfate.
A catalyst for use in a Kjeldahl type destruction mixture consisting of tablets of an antimonate and a salt which increases the boiling point of a Kjeldahl type destruction mixture.
Dependencies are inferred from the claim text.