COMPOSITE FOR EXPRESS-TESTING NITRATE ION BY METHOD OF DROP-VISUAL COLORIMETRIC ANALYSIS

COMPOSITE FOR EXPRESS-TESTING NITRATE ION BY METHOD OF DROP-VISUAL COLORIMETRIC ANALYSIS

FIELD: analytical chemistry. SUBSTANCE: invention relates to composites used for determination of nitrate ions. Composite comprises the following components, wt. %: silica gel containing 3 wt.% of para-nitroaniline, 1.5; silica gel containing 1 wt.% of chromotropic acid disodium salt, 1; silica gel...

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Bibliographische Detailangaben
Hauptverfasser: KNJAZEV V.D, IVANOV V.M, KNJAZEV D.A, ZOLOTOV JU.A, SAMOKHVALOV S.G, MARKINA V.M
Format: Patent
Sprache:eng ; rus
Schlagworte:
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
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Beschreibung
Zusammenfassung:FIELD: analytical chemistry. SUBSTANCE: invention relates to composites used for determination of nitrate ions. Composite comprises the following components, wt. %: silica gel containing 3 wt.% of para-nitroaniline, 1.5; silica gel containing 1 wt.% of chromotropic acid disodium salt, 1; silica gel containing 10 wt.% of racemic acid, 26; silica gel containing 5 wt.% of potassium hydrocarbonate, 2.7; powder-like zinc, 0.4; anhydrous sucrose, up to 100% of total mixture mass. Invention provides to expand the range of nitrate ions concentration to be determined, reduce sample volume and time of analysis. EFFECT: improved method of analysis, valuable properties of composite. 2 tbl, 1 ex