JPH04305Y2 - - Google Patents
Info
- Publication number
- JPH04305Y2 JPH04305Y2 JP16238885U JP16238885U JPH04305Y2 JP H04305 Y2 JPH04305 Y2 JP H04305Y2 JP 16238885 U JP16238885 U JP 16238885U JP 16238885 U JP16238885 U JP 16238885U JP H04305 Y2 JPH04305 Y2 JP H04305Y2
- Authority
- JP
- Japan
- Prior art keywords
- ozone
- electrode
- holder
- electrolytic solution
- measurement
- 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.)
- Expired
Links
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 66
- 238000005259 measurement Methods 0.000 claims description 17
- 239000012528 membrane Substances 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 14
- 239000008151 electrolyte solution Substances 0.000 claims description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 239000003792 electrolyte Substances 0.000 claims description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 6
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 229910052697 platinum Inorganic materials 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 12
- 229910052760 oxygen Inorganic materials 0.000 description 12
- 239000001301 oxygen Substances 0.000 description 12
- 239000012466 permeate Substances 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
Landscapes
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
- Electrodes For Compound Or Non-Metal Manufacture (AREA)
Description
【考案の詳細な説明】
『産業上の利用分野』
本考案はオゾン濃度を電気化学的に測定するオ
ゾン測定電極の改良に関するものである。[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to an improvement of an ozone measuring electrode for electrochemically measuring ozone concentration.
『従来の技術』
従来、この種のオゾン測定電極としては、第２
図に示されるごとく、保持体１の開口部２に、該
保持体１内に収納する電解液３の密封と、酸素の
透過作用を兼ねる酸素透過膜７を配し、上記保持
体１の電解液３中には陽極５ａと陰極５ｂとから
なる測定電極５を収納し、さらに、該酸素透過膜
７の外側にはこれを覆うようにオゾン分解膜８配
してなるオゾン電極と、このオゾン電極のオゾン
分解膜８を取り除いた酸素電極とを対で使用する
ものが特公昭58−11021号に開示されている。``Prior art'' Conventionally, this type of ozone measurement electrode was
As shown in the figure, an oxygen permeable membrane 7 is disposed in the opening 2 of the holder 1 to seal the electrolyte 3 housed in the holder 1 and to permeate oxygen. A measuring electrode 5 consisting of an anode 5a and a cathode 5b is housed in the liquid 3, and an ozone electrode consisting of an ozone decomposing membrane 8 disposed on the outside of the oxygen permeable membrane 7 so as to cover it, and the ozone Japanese Patent Publication No. Sho 58-11021 discloses an electrode that uses an oxygen electrode from which the ozone decomposition membrane 8 has been removed.
この従来例の測定原理は、｛オゾン量＝オゾン
分解膜７で還元された酸素を含む全酸素量−酸素
電極で測定した元来の酸素量｝で間接的に求めら
れている。 The measurement principle of this conventional example is determined indirectly by {amount of ozone=total amount of oxygen including oxygen reduced by the ozone decomposition membrane 7−original amount of oxygen measured with the oxygen electrode}.
『考案が解決しようとする問題点』
しかし、この従来例オゾン測定電極は、オゾン
電極と酸素電極とを必要とし、さらには両者の測
定値を演算するための演算回路をも必要とし、さ
らにはオゾン量を間接的に測定するため測定誤差
原因を内包するものであつた。``Problems to be solved by the invention'' However, this conventional ozone measurement electrode requires an ozone electrode and an oxygen electrode, and also requires an arithmetic circuit to calculate the measured values of both. Since the amount of ozone is measured indirectly, there is a source of measurement error.
また、従来の上記オゾン電極と酸素電極とは、
保持体１内の酸素濃度を測定するようになつて試
料の濃度変化に追随できず、応答速度が遅く、し
かも測定の繰り返し精度が不良で測定値の再現性
が乏しいという欠点を有していた。 Furthermore, the conventional ozone electrode and oxygen electrode mentioned above are
Since the oxygen concentration within the holder 1 has been measured, it has been difficult to follow changes in the concentration of the sample, has slow response speed, and has the drawbacks of poor measurement repeatability and poor reproducibility of measured values. .
そこで、本考案は、上記欠点を解決すべくなさ
れたもので、高速応答性および高精度測定が可能
な直読式オゾン測定電極を提供することを目的と
したものである。 Therefore, the present invention has been made to solve the above-mentioned drawbacks, and its object is to provide a direct-reading ozone measurement electrode that is capable of high-speed response and high-precision measurement.
『問題点を解決するための手段』
上記の目的に沿い、先述実用新案登録請求の範
囲を要旨とする本考案の構成は前述問題点を解決
するために、保持体１の開口部２に、該保持体１
内に収納する電解液３の密封と、オゾンの透過作
用を兼ねるオゾン透過膜４を配し、上記保持体１
の電解液３中には陽極５ａと陰極５ｂとからなる
測定電極５を収納し、さらに、上記電解液３中に
は、炭素繊維、活性炭、白金等からなるオゾン還
元材６を、測定電極５に短絡させることなく収納
してなる技術的手段を講じたものである。"Means for Solving the Problems" In line with the above-mentioned purpose, the structure of the present invention, which is summarized in the claims of the above-mentioned utility model registration, has the following features in the opening 2 of the holder 1: The holding body 1
The holder 1 is provided with an ozone permeable membrane 4 which serves both to seal the electrolytic solution 3 stored therein and to permeate ozone.
A measurement electrode 5 consisting of an anode 5a and a cathode 5b is housed in the electrolyte 3, and an ozone reducing material 6 made of carbon fiber, activated carbon, platinum, etc. is housed in the electrolyte 3. This is a technical measure that allows the battery to be housed without causing a short circuit.
『作用』
それ故、本考案オゾン測定器は、オゾン透過膜
４部を試料液または試料ガス等の試料９中に浸漬
する。すると、該試料９中のの分子状オゾンがオ
ゾン透過膜４を通して電解液３内に流入する。こ
の時、オゾン検出電極である陰極５ｂにおいて、
｛O3＋H2Ｏ＋2e-→O2＋２（OH-）〕｝の反応によ
りオゾンが還元されて、対局である陽極５ａとの
間に電流が流れ、この値は試料９中のオゾン濃度
に比例する。すなわち、この値から試料９中のオ
ゾン濃度が直接計測できることになる。"Function" Therefore, in the ozone measuring device of the present invention, four parts of the ozone permeable membrane are immersed in a sample 9 such as a sample liquid or a sample gas. Then, molecular ozone in the sample 9 flows into the electrolytic solution 3 through the ozone permeable membrane 4. At this time, at the cathode 5b which is the ozone detection electrode,
Due to the reaction {O 3 + H 2 O + 2e - → O 2 + 2 (OH - )}, ozone is reduced, and a current flows between it and the opposing anode 5a, and this value is proportional to the ozone concentration in the sample 9. do. That is, the ozone concentration in the sample 9 can be directly measured from this value.
なお、オゾン透過膜４を通して電解液３に流入
するオゾン量が測定電極５の還元能力をうわまわ
る場合には、電解液３内に残留オゾンが蓄積され
ることになるが、本考案はオゾン還元材６を電解
液３中に配してなるため、電解液３中の残留オゾ
ンは還元分解されて該電解液３中の残留オゾンは
実質ゼロ値に維持され、測定電極５は常に流入オ
ゾン濃度のみを正確に測定することになる。 Note that if the amount of ozone flowing into the electrolytic solution 3 through the ozone permeable membrane 4 exceeds the reducing ability of the measuring electrode 5, residual ozone will accumulate in the electrolytic solution 3. Since the material 6 is disposed in the electrolytic solution 3, the residual ozone in the electrolytic solution 3 is reductively decomposed and the residual ozone in the electrolytic solution 3 is maintained at a substantially zero value, and the measuring electrode 5 always monitors the inflowing ozone concentration. It will be necessary to accurately measure only the
『実施例』
次に、本考案を第１図に示す実施例により詳細
に説明する。``Example'' Next, the present invention will be explained in detail with reference to an example shown in FIG.
図中、１が先端に開口部２を有した保持体で、
この保持体１の開口部２に、該保持体１内に収納
する電解液３の密封と、オゾンの透過作用を兼ね
るオゾン透過膜４を配してある。このオゾン透過
膜４は、ポリエチレン、シリコンゴム、弗素樹脂
等の樹脂薄膜が使用できることが従来技術により
知られている。 In the figure, 1 is a holder having an opening 2 at its tip;
An ozone permeable membrane 4 is disposed in the opening 2 of the holder 1, which serves both to seal the electrolytic solution 3 contained in the holder 1 and to permeate ozone. It is known from the prior art that this ozone permeable membrane 4 can be made of a thin resin film made of polyethylene, silicone rubber, fluororesin, or the like.
上記保持体１の電解液３中には陽極５ａと陰極
５ｂとからなる測定電極５を収納し、この測定電
極５は電源、増巾器、表示器等に連結し、陽極５
ａと陰極５ｂ間に流れる電流値がオゾン濃度に換
算されて表示器に表示されるようになしてある
が、この電極、増巾器、表示器等の組合せは従来
技術により種々実現可能であるたま、図示および
詳細な説明を省略する。 A measurement electrode 5 consisting of an anode 5a and a cathode 5b is housed in the electrolyte 3 of the holder 1, and the measurement electrode 5 is connected to a power source, an amplifier, a display, etc.
The current value flowing between a and the cathode 5b is converted into ozone concentration and displayed on the display, but various combinations of the electrode, amplifier, display, etc. can be realized using conventional technology. For now, illustrations and detailed explanations will be omitted.
さらに、上記電解液３中には、炭素繊維、活性
炭、白金等からなるオゾン還元材６を、測定電極
５に短絡させることなく収納してある。このオゾ
ン還元材６は、測定電極５すなわち陽極５ａと陰
極５ｂとの間を短絡させることなく、陰極５ｂと
保持体１との間隙全面に分散して収納することが
望ましい。 Further, an ozone reducing material 6 made of carbon fiber, activated carbon, platinum, etc. is housed in the electrolytic solution 3 without shorting it to the measuring electrode 5. It is desirable that the ozone reducing material 6 is dispersed and stored over the entire gap between the cathode 5b and the holder 1 without causing a short circuit between the measurement electrode 5, that is, the anode 5a and the cathode 5b.
なお、図中、１１はオゾン透過膜４の締着リン
グ、１２はＯリングを示すものである。 In the figure, 11 indicates a fastening ring for the ozone permeable membrane 4, and 12 indicates an O-ring.
『考案の効果』
本考案は、上記のごときで、オゾン濃度を直読
するため、簡易、小型な装置で高精度な測定が可
能なオゾン測定電極を提供できるものである。[Effects of the Invention] As described above, the present invention can provide an ozone measuring electrode that directly reads the ozone concentration and thus enables highly accurate measurement with a simple and compact device.
特に、本考案は電解液３中にオゾン還元材６を
収納してなるため、電解液３中のオゾン濃度を測
定するのではなく、オゾン透過膜４より流入する
試料９のオゾン濃度を直接測定するため、応答速
度、測定精度の顕著な向上が実現できるものであ
る。このオゾン還元材６の収納による効果を実験
により確認した結果は以下の通りである。 In particular, since the present invention stores the ozone reducing material 6 in the electrolytic solution 3, it does not measure the ozone concentration in the electrolytic solution 3, but directly measures the ozone concentration in the sample 9 flowing through the ozone permeable membrane 4. Therefore, significant improvements in response speed and measurement accuracy can be realized. The results of experiments confirming the effect of storing the ozone reducing material 6 are as follows.
『実験結果の１』
オゾン濃度４％（vol／vol）と酸素濃度96％
（vol／vol）の混合ガスを試料９として使用し、
応答速度としては、本オゾン測定器をこの試料９
からオゾン９％の酸素ガスに移動した場合の測定
値の変化応答速度を秒で示し、精度としては、上
記の測定を１分間隔で５回繰り返した時オゾン４
％に相当する測定値の変動巾をオゾン％で示すも
のとする。すると、オゾン還元材６を配しない場
合は、応答速度が120秒であつたのがオゾン還元
材６を配すると８秒に短縮でき、精度は、オゾン
還元材６を配しない場合は、0.4％であつたもの
が0.02％に向上した。“Experiment Results 1” Ozone concentration 4% (vol/vol) and oxygen concentration 96%
(vol/vol) mixed gas was used as sample 9,
Regarding the response speed, this ozone measuring instrument was used for this sample 9.
It shows the change response speed of the measured value in seconds when moving from ozone to 9% oxygen gas, and the accuracy is as follows: When the above measurement is repeated 5 times at 1 minute intervals, ozone 4%
% shall be expressed as ozone %. Then, the response speed was 120 seconds without the ozone reducing material 6, but it could be shortened to 8 seconds with the ozone reducing material 6, and the accuracy was 0.4% without the ozone reducing material 6. The percentage that was 10% increased to 0.02%.
『実験結果の２』
オゾン濃度10PPM（wt／vol）の水溶液を試料
９として使用し、応答速度としては、本オゾン測
定器をこの試料９からオゾン0PPMの水溶液中に
移動した場合の測定値の変化応答速度を秒で示
し、精度としては、上記の測定を１分間隔で５回
繰り返した時オゾン10PPMに相当する測定値の
変動巾をオゾンPPMで示すものとする。すると、
オゾン還元材６を配しない場合は、応答速度が８
秒であつたのがオゾン還元材６を配すると１秒に
短縮でき、精度は、オゾン還元材６を配しない場
合は、1PPMであつたものが0.2PPMに向上した。"Experimental Results 2" An aqueous solution with an ozone concentration of 10 PPM (wt/vol) is used as sample 9, and the response speed is as follows: The change response speed is expressed in seconds, and the accuracy is expressed in ozone PPM as the variation range of the measured value corresponding to 10 PPM of ozone when the above measurement is repeated five times at one-minute intervals. Then,
If ozone reducing material 6 is not provided, the response speed is 8.
When the ozone reducing material 6 was disposed, the accuracy could be reduced from 1 second to 1 second, and the accuracy was improved from 1 PPM to 0.2 PPM when the ozone reducing material 6 was not disposed.
第１図は本考案オゾン測定電極の一実施例を示
す縦断面図、第２図は従来例要部縦断面図であ
る。
１……保持体、２……開口部、３……電解液、
４……オゾン透過膜、５……測定電極、５ａ……
陽極、５ｂ……陰極、６……オゾン還元材。
FIG. 1 is a longitudinal sectional view showing an embodiment of the ozone measuring electrode of the present invention, and FIG. 2 is a longitudinal sectional view of the main part of a conventional example. 1... Holder, 2... Opening, 3... Electrolyte,
4...Ozone permeable membrane, 5...Measurement electrode, 5a...
Anode, 5b... cathode, 6... ozone reducing material.
Claims (1)
る電解液３の密封と、オゾンの透過作用を兼ねる
オゾン透過膜４を配し、 上記保持体１の電解液３中には陽極５ａと陰極
５ｂとからなる測定電極５を収納し、 さらに、上記電解液３中には、炭素繊維、活性
炭、白金等からなるオゾン還元材６を、測定電極
５に短絡させることなく収納してなるオゾン測定
電極。[Claims for Utility Model Registration] An ozone permeable membrane 4 is disposed in the opening 2 of the holder 1 to seal the electrolyte 3 stored in the holder 1 and to transmit ozone. A measuring electrode 5 consisting of an anode 5a and a cathode 5b is housed in the electrolytic solution 3, and an ozone reducing material 6 made of carbon fiber, activated carbon, platinum, etc. is housed in the electrolytic solution 3. An ozone measurement electrode that can be stored without causing a short circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16238885U JPH04305Y2 (en) | 1985-10-23 | 1985-10-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16238885U JPH04305Y2 (en) | 1985-10-23 | 1985-10-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6271555U JPS6271555U (en) | 1987-05-07 |
| JPH04305Y2 true JPH04305Y2 (en) | 1992-01-07 |
Family
ID=31089602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16238885U Expired JPH04305Y2 (en) | 1985-10-23 | 1985-10-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04305Y2 (en) |
-
1985
- 1985-10-23 JP JP16238885U patent/JPH04305Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6271555U (en) | 1987-05-07 |
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