Automated methods for ammonium, nitrate, and nitrite in 2MKCl‐phenylmercuric acetate extracts of soil
作者:
F. J. Adamsen,
D. S. Bigelow,
G. R. Scott,
期刊:
Communications in Soil Science and Plant Analysis
(Taylor Available online 1985)
卷期:
Volume 16,
issue 8
页码: 883-898
ISSN:0010-3624
年代: 1985
DOI:10.1080/00103628509367651
出版商: Taylor & Francis Group
关键词: Soil extract;cadmium reduction of nitrate;total nitrogen;Kjeldahl digest;nitrogen analyses
数据来源: Taylor
摘要:
Automated methods for determining ammonium, nitrate, and nitrite in a single soil extract containing 2MKCl and 5 mg/L phenylmercuric acetate are presented. The ammonium method is also suitable for Kjeldahl, soil and plant digests. Amino acid interferences with the ammonium method are reported. Ammonium is determined by a salicylate‐isocyanurate method, while nitrite is determined by the colorimetric reaction of N‐(l‐naphthyl)‐ethylenediamine dihydrochloride with sulfanilamide. Nitrate is determined in the same manner as nitrite after the sample has been passed through a Cu2+/Cd reduction column. The difference between the Cu2+/Cd reduced sample and nitrite sample value is nitrate.
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