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Application

3598661/04, 1983-05-26

(22)

Actual filing date

1983-05-26

(45)

Published

1997-03-10

(72)

Inventor

Anufrieva E.V.Nekrasova T.N.Sheveleva T.V.Prokhorova L.K.Nekrasova E.M.Sklizkova V.P.Dergacheva E.N.Koton M.M.Borovik V.P.Mamaev V.P.

METHOD OF TETRACARBOXYLIC ACID DIANHYDRIDES PURITY ESTIMATION Russian patent published in 1997 - IPC

Abstract SU 1132674 A1

FIELD: analytical chemistry. SUBSTANCE: sample of an analyzed substance is added to di-(aminophenyl)-pyrimidine solution in dimethylformamide at mole ratio of di-(aminophenyl)-pyrimidine to sample = 1:(0.5-0.7) followed by luminescence measurement of the obtained mixture and that of di-(aminophenyl)-pyrimidine in dimethylformamide and purity estimation of dianhydrides by calculation method. EFFECT: improved method of estimation.

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SU 1 132 674 A1

Authors

Anufrieva E.V.

Nekrasova T.N.

Sheveleva T.V.

Prokhorova L.K.

Nekrasova E.M.

Sklizkova V.P.

Dergacheva E.N.

Koton M.M.

Borovik V.P.

Mamaev V.P.

Dates

1997-03-10—Published

1983-05-26—Filed

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