SU1569690A1 - Method of identification of organic peroxides - Google Patents
Method of identification of organic peroxides Download PDFInfo
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- SU1569690A1 SU1569690A1 SU884485022A SU4485022A SU1569690A1 SU 1569690 A1 SU1569690 A1 SU 1569690A1 SU 884485022 A SU884485022 A SU 884485022A SU 4485022 A SU4485022 A SU 4485022A SU 1569690 A1 SU1569690 A1 SU 1569690A1
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- identification
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- ionization constant
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Abstract
Изобретение относитс к аналитической химии, в частности к способу идентификации органических пероксикарбоновых кислот. С целью повышени точности и избирательности способа измер ют зависимость окислительно-восстановительного потенциала от PH анализируемого раствора, а по точке изгиба кривой этой зависимости определ ть константу ионизации. При этом PH задают с помощью буферных растворов. 1 ил.This invention relates to analytical chemistry, in particular to a method for the identification of organic peroxycarboxylic acids. In order to increase the accuracy and selectivity of the method, the dependence of the redox potential on the PH of the analyzed solution is measured, and the ionization constant is determined from the bend point of the curve of this dependence. In this case, PH is set using buffer solutions. 1 il.
Description
Изобретение относитс к аналитической химии, в частности к способу идентификации неизвестных пероксикис- лот.This invention relates to analytical chemistry, in particular, to a method for identifying unknown peroxy acids.
Целью изобретени вл етс повышение точности и избирательности способа .The aim of the invention is to improve the accuracy and selectivity of the method.
На чертеже приведен график зависимостей окислительно-восстановительного потенциала от рН дл растворов перуксусной кислоты (А - экспериментальна , В - теоретическа ).The drawing shows a graph of the dependence of the redox potential on pH for solutions of peracetic acid (A - experimental, B - theoretical).
Способ осуществл етс следующим образом .The method is carried out as follows.
Навеску анализируемой пероксикис- лоты, содержащую 0,002 моль активного вещества, раствор ют в этиловом спирте и разбавл ют дистиллированной водой до 100 мл. Аликвотную часть полученного раствора объемом 5,0 мл помещают в химический стакан емкостью 75 мл и довод т объем до 50 млA weighed portion of the peroxy acid analyzed, containing 0.002 mol of the active substance, is dissolved in ethyl alcohol and diluted with distilled water to 100 ml. An aliquot of the resulting 5.0 ml solution is placed in a 75 ml beaker and the volume is adjusted to 50 ml.
буферной смесью. Затем в раствор опускают индикаторный электрод типа 30-01 и хлорсеребр ный электрод, служащий электродом сравнени . С помощью цифрового милливольтметра измер ют разность потенциалов между электродами. Далее поступают аналогично, использу буферные смеси с другими значени ми рН. Стро т график зависимости разности потенциалов (Е, мВ) от рН. Константу ионизации неизвестной перокси- кислоты наход т по получеиьой кривой , рКа неизвестной кислоты равен значению рН в точке изгиба кривой (чертеж). Найденное значение рКа сопоставл ют с табличными данными справочной литературы или, если такие сведени отсутствуют, с таковыми, полученными предлагаемым способом с использованием образцов пероксикислот известной природы.buffer mixture. Then a type 30-01 indicator electrode and a silver-chloride electrode serving as a reference electrode are immersed in the solution. Using a digital millivoltmeter, the potential difference between the electrodes is measured. Next, do the same, using buffer mixtures with other pH values. A graph of potential difference (E, mV) versus pH is plotted. The ionization constant of the unknown peroxy acid is found from the preparative curve, the pKa of the unknown acid is equal to the pH value at the bending point of the curve (drawing). The pKa value found is compared with tabular data from the reference literature or, if such information is not available, with those obtained by the proposed method using samples of peroxyacids of known nature.
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о е &эabout e & e
, Способ позвол ет с высокой точностью и избирательностью идентифицировать органические пероксикислоты.The method permits the identification of organic peroxy acids with high accuracy and selectivity.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU884485022A SU1569690A1 (en) | 1988-06-21 | 1988-06-21 | Method of identification of organic peroxides |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU884485022A SU1569690A1 (en) | 1988-06-21 | 1988-06-21 | Method of identification of organic peroxides |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU1569690A1 true SU1569690A1 (en) | 1990-06-07 |
Family
ID=21400287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU884485022A SU1569690A1 (en) | 1988-06-21 | 1988-06-21 | Method of identification of organic peroxides |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU1569690A1 (en) |
-
1988
- 1988-06-21 SU SU884485022A patent/SU1569690A1/en active
Non-Patent Citations (1)
| Title |
|---|
| Антоновский В.А. Аналитическа хими пероксидных соединений,- М.: Хими , 1978, с.101 . Фритц Дж., Шенк Г. Количественный анализ.-М.: Мир, 1978, с.492-494. * |
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