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A highly sensitive automated technique for the determination of ammonium nitrogen
Author(s) -
Brown Michael W.
Publication year - 1973
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740240915
Subject(s) - hypochlorite , ammonium , phenol , nitrogen , sensitivity (control systems) , chemistry , action (physics) , chromatography , computer science , inorganic chemistry , organic chemistry , engineering , physics , electronic engineering , quantum mechanics
The catalytic action of nitroprusside on the phenol hypochlorite reaction has been utilised to design a more sensitive automated technique for determining ammonium nitrogen in soil extracts. The method gives reproducible results in close agreement with manual methods. Sensitivity is such that as little as 0.1 parts/ million of N in solution can be determined without the use of recorder range expansion.