JPH04254751A - Measuring method of concentration of ozone - Google Patents
Measuring method of concentration of ozoneInfo
- Publication number
- JPH04254751A JPH04254751A JP3037950A JP3795091A JPH04254751A JP H04254751 A JPH04254751 A JP H04254751A JP 3037950 A JP3037950 A JP 3037950A JP 3795091 A JP3795091 A JP 3795091A JP H04254751 A JPH04254751 A JP H04254751A
- Authority
- JP
- Japan
- Prior art keywords
- oxygen
- sensor
- stabilized zirconia
- ozone
- concentration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims description 24
- 229910002076 stabilized zirconia Inorganic materials 0.000 claims abstract description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 22
- 239000001301 oxygen Substances 0.000 abstract description 22
- 229910052760 oxygen Inorganic materials 0.000 abstract description 22
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 abstract description 12
- 238000005259 measurement Methods 0.000 abstract description 11
- 239000007789 gas Substances 0.000 abstract description 10
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052697 platinum Inorganic materials 0.000 abstract description 6
- 229910044991 metal oxide Inorganic materials 0.000 abstract description 2
- 150000004706 metal oxides Chemical class 0.000 abstract description 2
- 238000009792 diffusion process Methods 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 7
- 238000000053 physical method Methods 0.000 description 5
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 3
- 229910001882 dioxygen Inorganic materials 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000003869 coulometry Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 238000011197 physicochemical method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000002798 spectrophotometry method Methods 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
Landscapes
- Measuring Oxygen Concentration In Cells (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明はオゾン濃度測定法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for measuring ozone concentration.
【０００２】0002
【従来の技術】オゾン濃度測定法は、その測定原理によ
り物理的方法、物理化学的方法、及び化学的方法に分類
される。現在一般に使用されいるオゾン濃度測定法のう
ち、紫外線吸収法は物理的方法であり、化学発光法、電
量法、隔膜電極法は物理的化学的方法である。また、化
学的方法には吸光光度法、検知管法、ヨウ素滴定法があ
る。2. Description of the Related Art Ozone concentration measuring methods are classified into physical methods, physicochemical methods, and chemical methods depending on the measurement principle. Among the ozone concentration measurement methods commonly used at present, the ultraviolet absorption method is a physical method, and the chemiluminescence method, coulometric method, and diaphragm electrode method are physical and chemical methods. Further, chemical methods include spectrophotometry, detector tube method, and iodine titration method.
【０００３】0003
【発明が解決しようとする課題】従来のオゾン濃度測定
法のうち、化学的方法は、装置が大掛かりであり、測定
に時間を要する。また、電解液等の液体を使用するもの
は、バッチ処理となるために非能率であり、液寿命の問
題もある。これに対し、物理的方法は、装置が比較的簡
単で測定能率も高いが、光と電気の混成回路を用いるた
めに、ランプの寿命、光路の汚れなどによる精度低下の
問題がある。物理的化学的方法は、物理的方法、化学的
方法の少なくともいずれかの問題を避け得ない。[Problems to be Solved by the Invention] Among the conventional methods for measuring ozone concentration, the chemical method requires a large-scale apparatus and requires time for measurement. Furthermore, methods that use liquids such as electrolytes are inefficient due to batch processing, and there are also problems with the lifespan of the liquid. On the other hand, the physical method uses a relatively simple device and has high measurement efficiency, but because it uses a hybrid optical and electrical circuit, there are problems with reduced accuracy due to lamp life and contamination of the optical path. Physical and chemical methods cannot avoid problems with at least one of physical methods and chemical methods.
【０００４】本発明の目的は、簡単な装置で能率よく高
精度にオゾン濃度を測定し得るオゾン濃度測定法を提供
することにある。An object of the present invention is to provide an ozone concentration measuring method that can efficiently and accurately measure ozone concentration using a simple device.
【０００５】[0005]
【課題を解決するための手段】本発明のオゾン濃度測定
法は、安定化ジルコニアを用いたセンサでオゾン濃度を
測定する点に特徴がある。[Means for Solving the Problems] The ozone concentration measuring method of the present invention is characterized in that ozone concentration is measured with a sensor using stabilized zirconia.
【０００６】安定化ジルコニアは、ジルコニア（ＺｒＯ
２ ）にＣａＯ，ＭｇＯなどの低原子価の金属酸化物を
固溶させたものであり、酸素ガスセンサとして使用され
ている。安定化ジルコニアを用いた酸素ガスセンサの基
本構成を図２に示す。[0006] Stabilized zirconia is zirconia (ZrO
2) in which a low valence metal oxide such as CaO or MgO is dissolved as a solid solution, and is used as an oxygen gas sensor. Figure 2 shows the basic configuration of an oxygen gas sensor using stabilized zirconia.
【０００７】安定化ジルコニアを用いた酸素ガスセンサ
は、基本的には酸素濃淡電池により構成されている。安
定化ジルコニア１の両面に多孔質白金電極２，２が取り
付けられ、安定化ジルコニア１の一方の側に基準ガス、
他方の側に測定ガスをそれぞれ流すことにより、基準ガ
スと測定ガスとの酸素分圧差に応じた起電力が多孔質白
金電極２，２間に生じ、この起電力から測定ガスの酸素
分圧が測定される。[0007] An oxygen gas sensor using stabilized zirconia is basically constructed of an oxygen concentration cell. Porous platinum electrodes 2, 2 are attached to both sides of the stabilized zirconia 1, and a reference gas is attached to one side of the stabilized zirconia 1.
By flowing the measurement gas to the other side, an electromotive force corresponding to the oxygen partial pressure difference between the reference gas and the measurement gas is generated between the porous platinum electrodes 2, and from this electromotive force, the oxygen partial pressure of the measurement gas is determined. be measured.
【０００８】このような酸素濃淡電池は、従来は酸素セ
ンサとして使用されていたが、高精度なオゾンセンサと
しても使用可能なことが本発明者らの調査から明らかに
なった。酸素濃淡電池では、酸素がＯ２−イオンの状態
で電子を運ぶ。ここで、白金が触媒として酸素に働き、
電子を与えてＯ２−となるのを助け、これがジルコニア
内部をイオン移動する。オゾン又はオゾン含有の空気に
おいては、活性な酸素が存在するため、Ｏ２−への移転
を高めることでＯ２−のイオン移動量を増加させる。[0008] Such an oxygen concentration battery has conventionally been used as an oxygen sensor, but it has become clear through research by the present inventors that it can also be used as a highly accurate ozone sensor. In oxygen concentration batteries, oxygen carries electrons in the form of O2- ions. Here, platinum acts as a catalyst on oxygen,
It donates electrons to help it become O2-, which causes ions to move inside the zirconia. Since active oxygen exists in ozone or ozone-containing air, the amount of ion transfer of O2- is increased by increasing the transfer to O2-.
【０００９】本発明のオゾン濃度測定法によると、装置
が簡単で測定能率が高く、その上、光を使わず純電気的
に測定が行われるために、高精度で安定性も優れる。According to the ozone concentration measuring method of the present invention, the apparatus is simple and the measurement efficiency is high.Moreover, since the measurement is performed purely electrically without using light, it has high accuracy and excellent stability.
【００１０】本発明のオゾン濃度測定法に用いるセンサ
は、安定化ジルコニアを用いた酸素センサであれば型式
を問わず、酸素濃淡電池型以外にも、酸素ポンプを利用
して酸素拡散律速電流を測定し、その電流値から酸素濃
度を検出する限界電流型等を用いることができる。The sensor used in the ozone concentration measurement method of the present invention can be of any type as long as it uses stabilized zirconia.In addition to the oxygen concentration battery type, the sensor can also be of any type, as long as it uses stabilized zirconia. It is possible to use a limiting current type or the like that measures the oxygen concentration and detects the oxygen concentration from the current value.
【００１１】[0011]
【実施例】次に、本発明のオゾン濃度測定法の実施結果
を説明する。オゾン発生機で発生したオゾン化空気のオ
ゾン濃度を、オゾンモニタと安定化ジルコニアを用いた
センサで測定した。オゾンモニタは紫外線吸収式オゾン
濃度計である。安定化ジルコニアを用いたセンサは、一
端閉管型の酸素センサで、センサ出力０〜１０ｍｍＶ−
ＤＣが酸素濃度０〜１００％に相当する。オゾン濃度の
測定結果を表１および図１に示す。[Example] Next, the results of implementing the ozone concentration measuring method of the present invention will be explained. The ozone concentration of ozonized air generated by an ozone generator was measured using an ozone monitor and a sensor using stabilized zirconia. The ozone monitor is an ultraviolet absorption type ozone concentration meter. The sensor using stabilized zirconia is an oxygen sensor with a closed tube at one end, and the sensor output is 0 to 10 mmV-
DC corresponds to an oxygen concentration of 0 to 100%. The measurement results of ozone concentration are shown in Table 1 and FIG. 1.
【００１２】0012
【表１】[Table 1]
【００１３】表１および図１から明らかなように、オゾ
ンモニタの値にセンサ出力が正確に対応し、センサ出力
からオゾン濃度が高精度に測定される。As is clear from Table 1 and FIG. 1, the sensor output accurately corresponds to the ozone monitor value, and the ozone concentration can be measured with high precision from the sensor output.
【００１４】[0014]
【発明の効果】本発明のオゾン濃度測定法は、従来の化
学的方法に比して装置が簡単で能率が高く、物理的方法
に匹敵する合理性を有し、しかも、従来の物理的方法で
問題となる光の使用による精度低下等を生じない。[Effects of the Invention] The ozone concentration measuring method of the present invention has a simpler device and higher efficiency than conventional chemical methods, and has rationality comparable to physical methods. There is no problem such as deterioration in accuracy due to the use of light.
【図１】本発明法の測定精度を示すグラフである。FIG. 1 is a graph showing the measurement accuracy of the method of the present invention.
【図２】本発明法に使用するセンサの動作原理を示す模
式図である。FIG. 2 is a schematic diagram showing the operating principle of a sensor used in the method of the present invention.
１ 安定化ジルコニア ２ 多孔質白金電極 1 Stabilized zirconia 2 Porous platinum electrode
Claims (1)
ゾン濃度を測定することを特徴とするオゾン濃度測定法
。1. An ozone concentration measuring method characterized by measuring ozone concentration with a sensor using stabilized zirconia.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3037950A JPH04254751A (en) | 1991-02-06 | 1991-02-06 | Measuring method of concentration of ozone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3037950A JPH04254751A (en) | 1991-02-06 | 1991-02-06 | Measuring method of concentration of ozone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04254751A true JPH04254751A (en) | 1992-09-10 |
Family
ID=12511830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3037950A Pending JPH04254751A (en) | 1991-02-06 | 1991-02-06 | Measuring method of concentration of ozone |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04254751A (en) |
-
1991
- 1991-02-06 JP JP3037950A patent/JPH04254751A/en active Pending
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