Blister Drop–Pellet Tests for Nitrates and Nitrites |
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| Authors: | D A Knyazev V M Ivanov S G Samokhvalov Yu A Zolotov V M Markina V D Knyazev |
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| Institution: | (1) Timiryazev Agricultural Academy, Timiryazevskaya ul. 49, Moscow, 125008, Russia;(2) Department of Chemistry, Moscow State University, Vorob'evy gory, Moscow, GSP-3, 119899, Russia;(3) Department of Chemistry, Catholic University of America, Washington |
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| Abstract: | A visual rapid test in the volume of a blister cell containing a mixture of dry reagents in the form of a pellet was proposed. This provides a rapid test effect immediately after opening the cell and adding several drops of a test liquid. Pellets were developed for the visual determination of nitrate ions in the concentration range 40–2000 mg/L; the pellets include azo and diazo components, organic acid, zinc powder, silica gel, and filler. The distribution of errors in visual determinations was studied for aqueous solutions and cucumber and tomato juices with the participation of unexperienced observers. |
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