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Flow Injection Analysis of Nitrate in Soil Extracts—Evaluation of a Nitrate‐Selective Flow Electrode Method
Author(s) -
Schalscha E. B.,
Schirado T.,
Vergara I.
Publication year - 1981
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1981.03615995004500020044x
Subject(s) - flow injection analysis , nitrate , distillation , electrode , flow (mathematics) , chemistry , chromatography , environmental science , analytical chemistry (journal) , detection limit , mathematics , organic chemistry , geometry
Nitrate (NO 3 ‐ ) in soil saturation extracts was determined by a flow injection analysis (FIA) procedure and the results evaluated by comparing with the reduction‐distillation and the Cd‐reduction methods. Results show that the FIA using a NO 3 ‐ ‐specific end‐window flow electrode designed by Ruzicka and Hansen gave the same results as the other two methods. The range of application is from 0.5 to 100 µg/ml of NO 3 ‐N. The method is simple and rapid. More than 20 samples/hour can easily be determined. The FIA is appropriate for soil extracts and water analysis. The cost of the equipment is low, which makes it attractive for laboratories where financial resources are limited.