SU672559A1 - Nitrogen oxide analysis method - Google Patents
Nitrogen oxide analysis methodInfo
- Publication number
- SU672559A1 SU672559A1 SU772582463A SU2582463A SU672559A1 SU 672559 A1 SU672559 A1 SU 672559A1 SU 772582463 A SU772582463 A SU 772582463A SU 2582463 A SU2582463 A SU 2582463A SU 672559 A1 SU672559 A1 SU 672559A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- analysis method
- nitrogen oxide
- oxide analysis
- nitrogen oxides
- oxides
- Prior art date
Links
Landscapes
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
Description
- . 1 Изобретение отнЬситс к области аналитической химии. Оно может ёьзть использовано при создании приборов дЛ газового анализа. . Известен способ анализа окислов азота в воздухе, включающий измерение проводимости полупроводника при воздействии на его поверхность окислов азота l. Существенными недостатками; этого способа вл ютс : 1. Необратима сорбци анализируеких продуктов, значительно уменьшающа чувствительность полупроводника 2. Неповтор емость результатов измерени проводимости полупроводника при измен ющихс температуре и влажности анализируемой смеси и посто нной концентрации окислов, азота. Это объ сн етс тем, что при посто нной концентрации окислов азота изменение температуры обуславливает количественные и качественные изменени состава окислов, а наличие влаги измен ет их концентрацию за счет химического взаимодействи с ней. Известен также фотоколориметричес кий способ анализа окислов азота на .основании их селективной цветной реакции с реагентом 2, в результате которой измен етс прозрачность ленты . К существенным недостаткам способа относ тс : Г. Значительна завйсййостБ сигнала от температуры и влажности анализируемой смеси за счет изменени количественного и качественного состава окислов азота. 2, Значительна инерционность показаний , обусловленна длительностью наполнени анализируемых веществ. Прототипом предложенного способа вл етс .способ анализа окислов азота путем, .смешени пробы газа с реагентом в потоке газа-носител и пропускани через ионизационную камеру, в которой измер ют изменение тока ионизации, пропорциональное содержанию окислов азота в гаэе 3. В результате реакции окислов азота и аммиака в газовой фазе образуетс аэрозоль, уменьшающий начальный ток ионизационной камеры. Изменениё начального тока вл етс количественной мерой окислов азота. Этот способне позвол ет получить точные результаты из-за значительной зависимости сигнала от изменени -. 1 The invention relates to the field of analytical chemistry. It can be used to create instruments for gas analysis. . There is a method of analyzing nitrogen oxides in air, which includes measuring the conductivity of a semiconductor when exposed to its surface oxides of nitrogen l. Significant deficiencies; This method includes: 1. Irreversible sorption of analyzable products, significantly reducing the sensitivity of a semiconductor. 2. Inconsistency of the results of measuring the conductivity of a semiconductor with varying temperature and humidity of the analyzed mixture and a constant concentration of oxides and nitrogen. This is due to the fact that, at a constant concentration of nitrogen oxides, a change in temperature causes quantitative and qualitative changes in the composition of oxides, and the presence of moisture changes their concentration due to chemical interaction with it. A photocolorimetric method for analyzing nitrogen oxides is also known on the basis of their selective color reaction with reagent 2, which changes the transparency of the tape. Significant disadvantages of the method include: G. Significantly high signal from the temperature and humidity of the analyzed mixture due to changes in the quantitative and qualitative composition of nitrogen oxides. 2, Significant inertia of indications, due to the duration of the filling of the analyzed substances. The prototype of the proposed method is a method of analyzing nitrogen oxides by mixing a sample of a gas with a reagent in a stream of carrier gas and passing through an ionization chamber, in which a change in the ionization current proportional to the content of nitrogen oxides in gas 3 is measured. and ammonia in the gas phase, an aerosol is formed, which reduces the initial current of the ionization chamber. The change in initial current is a quantitative measure of nitrogen oxides. This is capable of producing accurate results due to the significant dependence of the signal on the change
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU772582463A SU672559A1 (en) | 1977-12-28 | 1977-12-28 | Nitrogen oxide analysis method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU772582463A SU672559A1 (en) | 1977-12-28 | 1977-12-28 | Nitrogen oxide analysis method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU672559A1 true SU672559A1 (en) | 1979-07-05 |
Family
ID=20750121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU772582463A SU672559A1 (en) | 1977-12-28 | 1977-12-28 | Nitrogen oxide analysis method |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU672559A1 (en) |
-
1977
- 1977-12-28 SU SU772582463A patent/SU672559A1/en active
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