A modified diacetyl monoxime method for colorimetric determination of urea in soil extracts1
作者:
R. L. Mulvaney,
J. M. Bremner,
期刊:
Communications in Soil Science and Plant Analysis
(Taylor Available online 1979)
卷期:
Volume 10,
issue 8
页码: 1163-1170
ISSN:0010-3624
年代: 1979
DOI:10.1080/00103627909366969
出版商: Taylor & Francis Group
关键词: urea;soil extracts;diacetyl monoxime
数据来源: Taylor
摘要:
Some batches of phosphoric acid contain impurities that affect colorimetric determination of urea in soil extracts by the method of Douglas and Bremner, which involves measurement of the red color formed when an aliquot of extract is heated with diacetyl monoxime and thiosemicarbazide in the presence of phosphoric and sulfuric acid. A modification of this colorimetric procedure is described that permits use of phosphoric acid containing these impurities and allows accurate and precise determination of urea in soil extracts.
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