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2 127 878

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IPC

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Application

97116058/04, 1997-09-30

(22)

Actual filing date

1997-09-30

(45)

Published

1999-03-20

(72)

Inventor

Korenman Ja.I.Novikova N.A.Niftaliev S.I.

(73)

Holder

Voronezhskaja Gosudarstvennaja Tekhnologicheskaja Akademija

METHOD OF SEPARATELY DETERMINING TANNIN AND CATECHINS (ON CONVERSION TO GALLIC ACID) IN TEA Russian patent published in 1999 - IPC

Abstract RU 2127878 C1

FIELD: analytical methods in food industry. SUBSTANCE: method includes sampling, determination of tannin by conductometric titration technique involving precipitation mechanism (reaction with gelatin), extraction concentration with isobutyl alcohol, and determination of catechins in extract by indirect conductometry technique involving complex formation with Fe(III). EFFECT: simplified analysis and improved its accuracy. 1 dwg, 2 tbl

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RU 2 127 878 C1

Authors

Korenman Ja.I.

Novikova N.A.

Niftaliev S.I.

Dates

1999-03-20—Published

1997-09-30—Filed

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