FIELD: analytical chemistry; food industry.
SUBSTANCE: method of obtaining silicon dioxide, modified by molybdophosphoric heteropolycompound, involves hydrolysis of tetraethoxysilane in a medium of ethanol in the presence of ammonium hexafluosilicate, molybdophosphoric heteropolycompound and a transition metal compound, which can be reduced, and with subsequent drying of the mature gel using microwave radiation with power from 800 to 1000 W. The indicator tube is made from a transparent tube made from glass or polymer material. The cavity of the tube is filled with powdered modified molybdophosphoric heteropolycompound silicon dioxide. The invention allows to obtain a porous modified silicon dioxide for determining 0.2-50 mg/l of diamides, 100-2000 mg/l ascorbic acid; 20-100 mg/l tin (II).
EFFECT: obtaining of porous modified silicon dioxide.
10 cl, 3 dwg, 1 tbl
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