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2 263 899

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IPC

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Application

2004119001/28, 2004-06-23

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Start date

2004-06-23

(22)

Actual filing date

2004-06-23

(45)

Published

2005-11-10

(72)

Inventor

Lembrikov V.M.Konjakhina L.V.Volkova V.V.Gritsenko L.S.Afanas'Eva L.G.Zatykina T.P.Tsareva L.I.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Nauchno-Issledovatel'Skij Institut Po Udobrenijam I Fosfornoj Kislote

METHOD OF QUANTITATIVELY DETERMINING IRON IN PHOSPHORIC ACIDS OBTAINED VIA SULFURIC ACID-ASSISTED DECOMPOSITION OF PHOSPHATE FEEDSTOCK FOLLOWED BY TRIBUTYL PHOSPHATE-ASSISTED PURIFICATION THEREOF Russian patent published in 2005 - IPC

Abstract RU 2263899 C1

FIELD: analytical methods.

SUBSTANCE: method comprises diluting test sample of acid with orthophosphoric acid reagent at volume ratio of diluent to solution being analyzed equal to 1:(0.002-1) followed by photometric measurement within wavelength range 200-270 nm. A diluent, aqueous solutions of orthophosphoric acid reagent with P₂O₅ concentration 10-40% are used.

EFFECT: reduced consumption of reagents, number of operations, and analysis time.

2 cl, 1 tbl

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RU 2 263 899 C1

Authors

Lembrikov V.M.

Konjakhina L.V.

Volkova V.V.

Gritsenko L.S.

Afanas'Eva L.G.

Zatykina T.P.

Tsareva L.I.

Dates

2005-11-10—Published

2004-06-23—Filed