Determination of soluble nitrogen by spectrophotometry

Submitted on behalf of the Analysis Committee of the European Brewery Convention

Abstract

A simple spectrophotometric method for the determination of nitrogen in unhopped wort has been tested by the EBC Analysis Committee and accepted for inclusion in Analytica-EBC. The spetrophotometric method is intended as a quick method for routine quality control. It is emphasized that the procedure has to be followed in detail and that the precautions stated under Notes on Procedure are most important. The average precision values obtained for the range 600 to 850 mg/litre were r₉₅ =30 and R₉₅=104.