SU1642358A1 - Coulometric method of determination of p-tolylphosphine - Google Patents

Coulometric method of determination of p-tolylphosphine Download PDF

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Publication number
SU1642358A1
SU1642358A1 SU894654217A SU4654217A SU1642358A1 SU 1642358 A1 SU1642358 A1 SU 1642358A1 SU 894654217 A SU894654217 A SU 894654217A SU 4654217 A SU4654217 A SU 4654217A SU 1642358 A1 SU1642358 A1 SU 1642358A1
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USSR - Soviet Union
Prior art keywords
tolylphosphine
determination
bromine
coulometric method
acetic acid
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SU894654217A
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Russian (ru)
Inventor
Ильдар Фартович Абдуллин
Гузель Загидовна Бадретдинова
Герман Константинович Будников
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Казанский государственный университет им.В.И.Ульянова-Ленина
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Priority to SU894654217A priority Critical patent/SU1642358A1/en
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Publication of SU1642358A1 publication Critical patent/SU1642358A1/en

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Abstract

Изобретение относитс  к анализу органических соединений и может быть использовано в контрольно-аналитических лаборатори х кинофотопроизводства дл  количественного определени  содержани  стабилизатора эмульсии цветной кинофотопленки . Цель изобретени  - повышение чувствительности. Поставленна  цель достигаетс  тем, что электрогенерируют бром на платиновом электроде при плотност х тока 0,5 - 20 rM/см в лед ной уксусной кислоте, содержащей 0,1 - 0,5 М HCI04 и 0,001 - 0,05 М (Et)4NBr, а конечную точку титровани  определ ют биамперокетриче- скиThe invention relates to the analysis of organic compounds and can be used in the control and analytical laboratories of film production to quantify the content of the stabilizer of an emulsion of color film. The purpose of the invention is to increase the sensitivity. This goal is achieved by electrogenerating bromine on a platinum electrode at current densities of 0.5-20 rM / cm in glacial acetic acid containing 0.1-0.5 M HCI04 and 0.001-0.05 M (Et) 4NBr , and the end point of the titration is determined by biamperotoxic

Description

Изобретение относитс  к анализу органических соединений, а именно к способам определени  п-толилфосфина, и может быть использовано в контрольно-аналитических лаборатори х кинофотопроизводства ,РПЯ количественного определени  содержани  стабилизатора эмульсии цветной кинофотопленки .The invention relates to the analysis of organic compounds, in particular to methods for the determination of p-tolylphosphine, and can be used in control and analytical laboratories for film production, RPNYa quantitative determination of the content of the stabilizer emulsion color film.

Целью изобретени   вл етс  разработка чувствительного способа кулонометриче- ского определени  п-толилфосфина формулы Р - (п-СбНбСНз)з в неводных растворах с помощью электрогенерировзнного брома.The aim of the invention is to develop a sensitive method for the coulometric determination of p-tolylphosphine of the formula P - (p-SbHbH3) 3 in non-aqueous solutions using electrogenerated bromine.

Способ осуществл етс  следующим образом .The method is carried out as follows.

В кулонометрическую  чейку внос т 20 мл 0.2 М по НС104 и 0,005 М по (Ei)4NBr раствора уксусной кислоты, добавл ют 1 мл 0,001 М раствора п-толилфосфина. Устанавливают величину генераторного тока 4 мА, включают цепь биамперометрической индикации и ведут генерацию брома, регистриру  изменение индикаторного тока в ходе электролиза По перегибу на кривой наход т точку эквивалентности По закону Фа- раде  рассчитывают количество определ емого п-толилсЬосфина20 ml of 0.2 M in HC104 and 0.005 M in (Ei) 4NBr solution of acetic acid are added to the coulometric cell, 1 ml of 0.001 M solution of p-tolylphosphine is added. The value of the generator current is set to 4 mA, the biamperometric indication circuit is switched on, and bromine is generated, and the change in the indicator current during electrolysis is detected. The equivalence point on the curve is determined by the equivalence point.

Предлагаема  кулонометрическа  методика  вл етс  экспрессной. В одной  чейке можно проводить до 3-4 определени . Соблюдение строгого температурного режима необ зательно, взаимодействие брома и определ емого вещества в растворе протекает при комнатной температуре Полученные результаты достаточно хорошо воспроизводимыThe proposed coulometric technique is express. Up to 3–4 determinations can be made in one well. Observance of a strict temperature regime is not necessary, the interaction of bromine and the analyte in solution takes place at room temperature. The obtained results are quite reproducible.

Claims (1)

Формула изобретени  Кулонометрический способ определени  п-толилфосфина при контролируемой силе тока, включающий электрохимическое генерирование титранта, отличаю щи й- с   тем, что, с целью повышени  чувствительности , элект регенерируют бром на платиновом электроде при плотности тока 0,5 О 4 ЮInvention A coulometric method for determining p-tolylphosphine at a controlled amperage, including electrochemical generation of a titrant, is distinguished by the fact that, in order to increase the sensitivity, the bromine on the platinum electrode is regenerated at a current density of 0.5 O 4 S САCa СЛSL сwith 20 мА/см2 в лед ной уксусной кислоте, со- (ЕфЫВг, а конечную точку титровани  опре- держащей 0,1 - 0,5 М НСЮ и O.Q01 - 0,05 М дел ют биамперометрически. .20 mA / cm2 in glacial acetic acid, co- (EfBBr, and the end point of the titration of 0.1 ± 0.5 M NSU and O.Q01 - 0.05 M are biamperometric.
SU894654217A 1989-02-23 1989-02-23 Coulometric method of determination of p-tolylphosphine SU1642358A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU894654217A SU1642358A1 (en) 1989-02-23 1989-02-23 Coulometric method of determination of p-tolylphosphine

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Application Number Priority Date Filing Date Title
SU894654217A SU1642358A1 (en) 1989-02-23 1989-02-23 Coulometric method of determination of p-tolylphosphine

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Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Федоров А.А и др. Аналитическа хими фосфора. М.: Наука, 1974. с 19. Gawargions YA., Anaf Chem Acta, 1987, v.196, pp 251-254. *

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