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2 249 814

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IPC

(21) (22)

Application

2003136395/28, 2003-12-18

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Start date

2003-12-18

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Actual filing date

2003-12-18

(45)

Published

2005-04-10

(72)

Inventor

Dedov A.G.Zrelova L.V.Nekrasova V.V.Filippenkova N.M.Neboga S.V.Kotova N.N.Mjasoedov B.F.Kuz'Min S.T.

(73)

Holder

Rossijskij Gosudarstvennyj Universitet Nefti I Gaza Im. I.M. Gubkina

METHOD OF DETERMINING GASOLINE LEAD LEVEL, INDICATOR COMPOSITION FOR IMPLEMENTATION THEREOF, AND A METHOD OF PREPARING SUPPORTED INDICATOR FOR DETERMINING GASOLINE LEAD LEVEL Russian patent published in 2005 - IPC

Abstract RU 2249814 C1

FIELD: fuel engineering.

SUBSTANCE: method comprises contacting test gasoline sample with supported indicator, in particular reductant containing thioamides functions, capable of reacting with lead to form a colored compound. Advantageously, reductant is thiourea or 4-phenylthiosemicarbazide, or yet thiosemicarbazone, and inert filler is glass. Indicator composition is constituted by supported indicator (70-80 wt %) and inert filler. Preparation of supported indicator consists in that above-defined reductant is non-covalently immobilized on alumogel after contact of aqueous solution of the former with the latter for 40-60 min under static conditions.

EFFECT: increased determination accuracy.

6 cl, 1 tbl

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RU 2 249 814 C1

Authors

Dedov A.G.

Zrelova L.V.

Nekrasova V.V.

Filippenkova N.M.

Neboga S.V.

Kotova N.N.

Mjasoedov B.F.

Kuz'Min S.T.

Dates

2005-04-10—Published

2003-12-18—Filed