Journal ArticleDOI
A spot test for nitrates
Philip W. West,P. L. Sarma +1 more
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TLDR
In this paper, it was shown that at a dilution of 1:200.000, and in the presence of excess sulfuric acid, as little as 0.2 μg nitrate ion forms a yellow color with chroniotropic acid.Abstract:
At a dilution of 1:200.000, and in the presence of excess sulfuric acid, as little as 0.2 μg nitrate ion forms a yellow color with chroniotropic acid. Interfering colors due to nitrites and oxidizing agents are eliminated by previous treatment of the test sample with sodium sulfite, sulfuric acid, and sulfamic acid.read more
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Spectrophotometric determination of nitrate using chromotropic acid
Philip W. West,T.P. Ramachandran +1 more
TL;DR: In this paper, a spectrophotometric method is described for the determination of nitrate in the 0.5 to 50μg range using chromotropic acid as the reagent and masking agents for the elimination of possible critical interferences due to chloride, chlorine, iron(III) and oxidants.
Journal ArticleDOI
A new method for the determination of nitrates
Philip W. West,George L. Lyles +1 more
TL;DR: In this article, a new method for the spectrophotometric determination of nitrate is proposed based on the use of chromotropic acid, which is highly selective, very sensitive, and can be quickly and easily applied.
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Interference of nitrate in the determination of formaldehyde by the chromotropic acid method
Journal ArticleDOI
Consistent terminology for efficiency in high performance thin-layer chromatography
Journal ArticleDOI
Determinação do nitrato em solos pelo método do ácido cromotrópico
TL;DR: Estabelecida a tecnica apropriada, o metodo foi aplicado na determinacao do ânion em extratos de solos obtidos com solucao de acido sulfurico 0,01 N.
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Journal ArticleDOI
Eine neue Methode zur quantitativen Bestimmung kleinster Mengen von Nitraten in Böden und Pflanzen
Jakob Blom,Cecil Treschow +1 more