@article {Nagel143, author = {C. W. Nagel and K. M. Weller}, title = {Colorimetric Determination of Urea in Wine}, volume = {40}, number = {2}, pages = {143--144}, year = {1989}, doi = {10.5344/ajev.1989.40.2.143}, publisher = {American Journal of Enology and Viticulture}, abstract = {A colorimetric method for the analysis of urea in wine and juices, capable of accurately estimating the urea content at concentrations as low as 1 mg/L, is described. Nitrogen compounds other than carbamido compounds do not interfere with the reaction.}, issn = {0002-9254}, URL = {https://www.ajevonline.org/content/40/2/143}, eprint = {https://www.ajevonline.org/content/40/2/143.full.pdf}, journal = {American Journal of Enology and Viticulture} }