SU868527A1 - Electrode for measuring nitrate-ion concentration - Google Patents
Electrode for measuring nitrate-ion concentration Download PDFInfo
- Publication number
- SU868527A1 SU868527A1 SU782629389A SU2629389A SU868527A1 SU 868527 A1 SU868527 A1 SU 868527A1 SU 782629389 A SU782629389 A SU 782629389A SU 2629389 A SU2629389 A SU 2629389A SU 868527 A1 SU868527 A1 SU 868527A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- electrode
- active substance
- nitrate
- ion concentration
- ion
- Prior art date
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- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Description
Изобретение относитс к физико-х мическим измерени м и может быть ис пользовано дл определени концентр ции нитрат-ионов в растворах при пр изводстве лекарств, фотореактивов, при анализе почвы и природных вод, а также газообразной двуокиси азота при контроле загр знений атмосферы. Известны нитратные ионоселектавные электроды, содержащие злектрод- неактивное вещество в виде жидкой ионообменной мембраны, включающей анион N 0 1 . Однако эти электроды имеют невысокую стабильность и воспроизводимость потенциала и ограниченную область линейности электродной функци Наиболее близким к предлагаемому вл етс пленочный ионоселективный электрод дл опреде-аенн нитрат-ионов , содержащий подложку и матрицу с введенным в нее электродноактивным веществом в качестве которого используют нитрат метилтрикаприлиламмони . Недостатком данного электрода вл етс низка чувствительность. Цель изобретени - повышение чувг ствитепьности электрода. Поставленна цель достигаетс тем, что в устройстве, содержащем подложку и матрицу с введенным в нее электродноактивным веществом, в качестве электродноактивного вещест- аа используют нерастворимое соединение двухвалентного железа, например закись железа. Электроды приготовл ют смешением электродноактивного вещества (закиси железа) с матрицей в соотношении 1:1 или 2:1 с последующим нанесением этой смеси на подложку из платинированного титана и высушиванием при комнатной температуре. В качестве матрицы используют фторопластовую эмульсию, что предотвращает гидрата1;ию и окисление FeO.The invention relates to physicochemical measurements and can be used to determine the concentration of nitrate ions in solutions in the manufacture of drugs, photoreactives, in the analysis of soil and natural waters, as well as gaseous nitrogen dioxide in the control of atmospheric pollution. Nitrate ion-selective electrodes are known that contain an electrically inactive substance in the form of a liquid ion-exchange membrane, including the anion N 0 1. However, these electrodes have a low stability and reproducibility of the potential and a limited area of linearity of the electrode function. The film ion-selective electrode for detecting aerial anne nitrate ions containing the substrate and the matrix with the electrode active substance used in it as methyltricaprilyl ammonium nitrate is closest to the present invention. The disadvantage of this electrode is low sensitivity. The purpose of the invention is to increase the sensitivity of the electrode. This goal is achieved by the fact that in the device containing a substrate and a matrix with an electrode-active substance introduced into it, an insoluble bivalent iron compound, such as ferrous oxide, is used as an electrode-active substance. Electrodes are prepared by mixing an electrode-active substance (ferrous oxide) with a matrix in a 1: 1 or 2: 1 ratio, followed by applying this mixture on a platinized titanium substrate and drying at room temperature. Fluoroplastic emulsion is used as a matrix, which prevents hydrate 1; iy and oxidation of FeO.
При погруженииWhen diving
электрода в раствор происходит хемосорбци N0 на основе окислитепьно-восстановительной реакрцelectrode into solution, N0 chemisorption is based on the oxidation-reduction reactivity
А BUT
ции между ионами N0 и Fe ,between the ions N0 and Fe,
Тверда мембрана на основе Fe ОFe O solid membrane
обладает хорошей проводимостью, что позвол ет исключить усипителы; из схемы измерени .has good conductivity, which allows us to exclude amplifiers; from the measurement scheme.
Электроды на основе закиси железа имеют линейную функцию в растворахFerrous oxide electrodes have a linear function in solutions
NaN. концентрацией наклоном 58-59 мВ и стабильно работают в течение двух мес цев, что позвол ет количественно определ ть содержа- ние NOo в области ПДК при контролеNaN. with a slope of 58–59 mV and stably operating for two months, which allows to quantitatively determine the NOo content in the MPC region under control
загр знени атмосфеды.pollution atmosphere.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU782629389A SU868527A1 (en) | 1978-06-16 | 1978-06-16 | Electrode for measuring nitrate-ion concentration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU782629389A SU868527A1 (en) | 1978-06-16 | 1978-06-16 | Electrode for measuring nitrate-ion concentration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU868527A1 true SU868527A1 (en) | 1981-09-30 |
Family
ID=20770448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU782629389A SU868527A1 (en) | 1978-06-16 | 1978-06-16 | Electrode for measuring nitrate-ion concentration |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU868527A1 (en) |
-
1978
- 1978-06-16 SU SU782629389A patent/SU868527A1/en active
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