RU96121103A - METHOD FOR DETERMINING ANHYDRID GROUPS - Google Patents

METHOD FOR DETERMINING ANHYDRID GROUPS

Info

Publication number
RU96121103A
RU96121103A RU96121103/04A RU96121103A RU96121103A RU 96121103 A RU96121103 A RU 96121103A RU 96121103/04 A RU96121103/04 A RU 96121103/04A RU 96121103 A RU96121103 A RU 96121103A RU 96121103 A RU96121103 A RU 96121103A
Authority
RU
Russia
Prior art keywords
determining
groups
anhydrid
piperidine
acetonitrile
Prior art date
Application number
RU96121103/04A
Other languages
Russian (ru)
Other versions
RU2124201C1 (en
Inventor
Ю.М. Евтушенко
Н.А. Карпушина
Г.Н. Евтушенко
Б.Е. Зайцев
Original Assignee
Закрытое акционерное общество "Электроизолит"
Filing date
Publication date
Application filed by Закрытое акционерное общество "Электроизолит" filed Critical Закрытое акционерное общество "Электроизолит"
Priority to RU96121103A priority Critical patent/RU2124201C1/en
Priority claimed from RU96121103A external-priority patent/RU2124201C1/en
Application granted granted Critical
Publication of RU2124201C1 publication Critical patent/RU2124201C1/en
Publication of RU96121103A publication Critical patent/RU96121103A/en

Links

Claims (1)

Способ определения ангидридных групп в ангидридах органических кислот, включающий обработку ангидрида амином в растворе для образования амида кислоты и последующим титрованием избытка амина в присутствии индикатора, отличающийся тем, что в качестве амидообразующего вещества используют пиперидин в ацетонитриле, а титрование избытка пиперидина проводят в смешанном растворителе ацетонитрил - вода в присутствии индикатора бромфенолового синего до перехода окраски от синей к желтой.A method for determining anhydride groups in organic acid anhydrides, comprising treating an anhydride with an amine in a solution to form an acid amide and then titrating an excess of an amine in the presence of an indicator, characterized in that piperidine in acetonitrile is used as the amide-forming substance, and an excess of piperidine is titrated in a mixed solvent of acetonitrile - water in the presence of an indicator of bromphenol blue until the color changes from blue to yellow.
RU96121103A 1996-10-23 1996-10-23 Method of determining anhydride groups in organic acid anhydrides RU2124201C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU96121103A RU2124201C1 (en) 1996-10-23 1996-10-23 Method of determining anhydride groups in organic acid anhydrides

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU96121103A RU2124201C1 (en) 1996-10-23 1996-10-23 Method of determining anhydride groups in organic acid anhydrides

Publications (2)

Publication Number Publication Date
RU2124201C1 RU2124201C1 (en) 1998-12-27
RU96121103A true RU96121103A (en) 1999-01-20

Family

ID=20186890

Family Applications (1)

Application Number Title Priority Date Filing Date
RU96121103A RU2124201C1 (en) 1996-10-23 1996-10-23 Method of determining anhydride groups in organic acid anhydrides

Country Status (1)

Country Link
RU (1) RU2124201C1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102399555B1 (en) * 2018-10-05 2022-05-17 주식회사 엘지화학 Analysis method for dianhydride
CN114414680B (en) * 2021-12-29 2023-10-13 江苏正济药业股份有限公司 Method for measuring related substances in various small molecule anhydrides

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