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2 212 655

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(51)

IPC

(21) (22)

Application

2002111308/28, 2002-04-25

(24)

Start date

2002-04-25

(22)

Actual filing date

2002-04-25

(45)

Published

2003-09-20

(72)

Inventor

Korenman Ja.I.Niftaliev Sabukhi Ilich OglyKonstantinova N.A.

(73)

Holder

Gosudarstvennoe Obrazovatel'Noe Uchrezhdenie Voronezhskaja Gosudarstvennaja Tekhnologicheskaja Akademija

METHOD OF SEPARATELY DETERMINING MONOAMINOBENZOIC ACIDS IN WATER Russian patent published in 2003 - IPC

Abstract RU 2212655 C1

FIELD: analytical methods. SUBSTANCE: method consisting of extraction followed by properly determination procedure is distinguished by that, before determining acids, extraction concentration is performed using 5-20 cu. cm of isopropyl alcohol in presence of lithium sulfate as salting-out agent taken in amount 20-25% of the weight of sample, extract is divided into two portions and monoaminobenzoic acids are determined by conductometric titration technique. In the first extract portion, m-aminobenzoic acid is titrated by solution of KOH in isopropyl alcohol and, in the second portion, o-aminobenzoic acid is titrated by solution of cuprous chloride KOH in isopropyl alcohol. p-Aminobenzoic acid concentration is calculated from data of alkalimetric and complexonometric titrations. EFFECT: increased analysis accuracy. 1 dwg, 1 tbl

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RU 2 212 655 C1

Authors

Korenman Ja.I.

Niftaliev Sabukhi Ilich Ogly

Konstantinova N.A.

Dates

2003-09-20—Published

2002-04-25—Filed