JPH08240562A - Hydrogen peroxide sensor for reactor water - Google Patents
Hydrogen peroxide sensor for reactor waterInfo
- Publication number
- JPH08240562A JPH08240562A JP7043812A JP4381295A JPH08240562A JP H08240562 A JPH08240562 A JP H08240562A JP 7043812 A JP7043812 A JP 7043812A JP 4381295 A JP4381295 A JP 4381295A JP H08240562 A JPH08240562 A JP H08240562A
- Authority
- JP
- Japan
- Prior art keywords
- hydrogen peroxide
- reactor water
- sensor
- peroxide sensor
- reactor
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Monitoring And Testing Of Nuclear Reactors (AREA)
- Measuring Oxygen Concentration In Cells (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、沸騰水型原子炉に係
り、特に、炉水中の過酸化水素濃度を直接測定する炉水
用過酸化水素センサに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boiling water reactor, and more particularly to a hydrogen peroxide sensor for reactor water which directly measures the concentration of hydrogen peroxide in the reactor water.
【０００２】[0002]
【従来の技術】沸騰水型原子炉では炉水が炉心近傍で中
性子・ガンマ線等の強い放射線照射を受ける結果、酸素
・過酸化水素をはじめとする水の分解生成物が形成され
る。特に過酸化水素に関しては、原子炉内構造材料の腐
食加速因子として、その定量は重要視されている。従来
の原子炉一次冷却系の炉水水質は、原子炉再循環系、あ
るいは原子炉冷却材浄化系に設けられた試料採取点から
炉水をサンプリングし、常温に冷却した後、例えば、特
願昭58−48686 号明細書に示す測定装置を用いて溶存酸
素，水素，過酸化水素を測定している。しかしこの手法
では冷却過程での過酸化水素の分解や測定までの時間遅
れによって、正確な過酸化水素の濃度を把握することが
できない。炉水の主配管における過酸化水素の直接測定
が可能なセンサは確立されていない。また特開平3−140
589 号公報に示される様に、イオン導電体にＬａＦ3，
ＢｉＯ3−ＭｏＯ3，ＳｒＣｌ2，β−ＰｂＦ2，ＰｂＳｎ
Ｆ4，Ｓｂ2Ｏ5・４Ｈ2Ｏ を用いた酸素センサが検討さ
れているが、過酸化水素の測定及び原子炉炉水への応用
はなされていない。2. Description of the Related Art In a boiling water nuclear reactor, as a result of strong irradiation of reactor water near the core with neutrons and gamma rays, decomposition products of water such as oxygen and hydrogen peroxide are formed. Especially, regarding hydrogen peroxide, its quantitative determination is regarded as important as a corrosion acceleration factor for the structural materials in the reactor. The water quality of reactor water in the conventional primary reactor cooling system is measured by sampling the reactor water from a sampling point provided in the reactor recirculation system or the reactor coolant purification system and cooling it to room temperature. Dissolved oxygen, hydrogen, and hydrogen peroxide are measured using the measuring device shown in Japanese Patent Publication No. 58-48686. However, this method cannot accurately determine the concentration of hydrogen peroxide due to the decomposition of hydrogen peroxide in the cooling process and the time delay until measurement. No sensor has been established that enables direct measurement of hydrogen peroxide in the main piping of reactor water. In addition, JP-A-3-140
As shown in Japanese Patent No. 589, the ionic conductor has LaF 3 ,
BiO 3 —MoO 3 , SrCl 2 , β-PbF 2 , PbSn
Oxygen sensors using F 4 , Sb 2 O 5 .4H 2 O have been studied, but neither hydrogen peroxide measurement nor application to reactor water has been made.
【０００３】[0003]
【発明が解決しようとする課題】従来の過酸化水素の測
定は、炉水をサンプリングし常温に冷却した後の測定に
よるものであった。しかし、この方法では冷却過程で過
酸化水素が分解し、成分相互のバランスが変化するた
め、正確な濃度を把握することはできなかった。The conventional measurement of hydrogen peroxide is based on the measurement after the reactor water is sampled and cooled to room temperature. However, in this method, hydrogen peroxide was decomposed in the cooling process and the balance between the components was changed, so that it was not possible to grasp the exact concentration.
【０００４】本発明の目的は、従来のサンプリング後の
測定では対応できなかった炉水主配管における過酸化水
素濃度の直接測定を可能とする炉水用過酸化水素センサ
を提供することにある。An object of the present invention is to provide a hydrogen peroxide sensor for reactor water, which enables direct measurement of the hydrogen peroxide concentration in the reactor water main pipe, which cannot be dealt with by the conventional measurement after sampling.
【０００５】[0005]
【課題を解決するための手段】本発明は、過酸化水素の
化学反応により電極電位が発生するイオン導電性物質の
両側に電極を取り付け、外部環境に影響を受けない基準
電極と，炉水中の過酸化水素によって電極電位が変化す
る検知電極との間の電位差、すなわち、起電力を測定す
る機能を備えた過酸化水素センサを骨子とする。本発明
により、炉水中の過酸化水素濃度を直接測定することが
可能となる。According to the present invention, electrodes are attached to both sides of an ionic conductive material whose electrode potential is generated by a chemical reaction of hydrogen peroxide, and a reference electrode which is not affected by the external environment and a reactor water. A skeleton is a hydrogen peroxide sensor having a function of measuring an electromotive force, that is, a potential difference between a detection electrode and an electrode potential which changes due to hydrogen peroxide. According to the present invention, it becomes possible to directly measure the hydrogen peroxide concentration in the reactor water.
【０００６】[0006]
【作用】固体電解質をはじめとするイオン導電性物質に
二つの電極を設け、一方を外部環境より影響を受けない
基準電極とし、他方を炉水中の過酸化水素濃度によって
電位が変化する検知電極とする。センサ全体の電位は基
準電極の電位と検知電極の電位との差によるものであ
り、センサの使用可能な過酸化水素の濃度範囲では、過
酸化水素濃度の対数に対して直線関係を示す。これを応
用し、未知濃度の過酸化水素に対するセンサ全体の電位
（起電力）を測定することによって、過酸化水素濃度を
算出することができる。[Function] Two electrodes are provided on an ion conductive material such as a solid electrolyte, one of which serves as a reference electrode that is not affected by the external environment, and the other of which serves as a detection electrode whose potential changes depending on the hydrogen peroxide concentration in the reactor water. To do. The electric potential of the whole sensor is due to the difference between the electric potential of the reference electrode and the electric potential of the detection electrode, and shows a linear relationship with the logarithm of the hydrogen peroxide concentration in the usable hydrogen peroxide concentration range of the sensor. By applying this, the hydrogen peroxide concentration can be calculated by measuring the potential (electromotive force) of the entire sensor with respect to hydrogen peroxide of unknown concentration.
【０００７】[0007]
【実施例】以下、本発明を実施例により説明する。EXAMPLES The present invention will be described below with reference to examples.
【０００８】図１は本発明の炉水用過酸化水素センサの
一例である。FIG. 1 shows an example of a hydrogen peroxide sensor for reactor water according to the present invention.
【０００９】図１において、イオン導電性物質１、例え
ば固体電解質フッ化ランタンの単結晶体である。１の両
側にはそれぞれ検知電極２，基準電極３を取り付けてい
る。例えば２は白金をフッ化ランタンの表面に蒸着して
いる。３はスズとフッ化スズの混合し溶融したものを接
着している。ここで基準電極３は外部環境、すなわち、
水に接触しないために絶縁材４、例えばエポキシ系樹脂
等によって３をシールしている。電極２，３はリード線
５例えば白金線によってポテンシャルスタット６に接続
されている。６によって出力される電位信号は指示変換
計７によって過酸化水素濃度に変換される。In FIG. 1, an ion conductive material 1, for example, a solid crystal of lanthanum fluoride solid electrolyte is shown. A detection electrode 2 and a reference electrode 3 are attached to both sides of the electrode 1. For example, 2 has platinum deposited on the surface of lanthanum fluoride. In No. 3, a mixture of tin and tin fluoride mixed and melted is bonded. Here, the reference electrode 3 is an external environment, that is,
In order to prevent contact with water, the insulating material 4, such as an epoxy resin, seals the material 3. The electrodes 2 and 3 are connected to a potential stat 6 by a lead wire 5, for example, a platinum wire. The potential signal output by 6 is converted into hydrogen peroxide concentration by the indicator converter 7.
【００１０】過酸化水素センサの原理を図２に示す。こ
こではイオン導電性物質１、例えばフッ化ランタンの固
体電解質が用いられる。ここでフッ化ランタンと検知電
極、例えば白金の蒸着膜と水との３層の界面では次の様
な電極反応が起こる。The principle of the hydrogen peroxide sensor is shown in FIG. Here, a solid electrolyte of ion conductive material 1, for example, lanthanum fluoride is used. Here, the following electrode reaction occurs at the three-layer interface between lanthanum fluoride and the detection electrode, for example, a platinum deposition film and water.
【００１１】[0011]
【化１】 Embedded image
【００１２】またはOr
【００１３】[0013]
【化２】 Embedded image
【００１４】このような電極反応が起こる際に検知電極
では検知電極電位が発生する。これをＥsen.とする。一
方、検知電極２の反対側には基準電極３、例えばスズと
フッ化スズの混合物がフッ化ランタンに接触している。
イオン導電性物質１のフッ化ランタンと基準電極３のス
ズとフッ化スズの混合物との間には次の様な電極反応が
起こる。When such an electrode reaction occurs, a detection electrode potential is generated at the detection electrode. This is called Esen. On the other hand, on the opposite side of the detection electrode 2, a reference electrode 3, for example, a mixture of tin and tin fluoride is in contact with lanthanum fluoride.
The following electrode reaction occurs between lanthanum fluoride as the ion conductive substance 1 and the mixture of tin and tin fluoride as the reference electrode 3.
【００１５】[0015]
【化３】 Embedded image
【００１６】そして検知電極と同様、基準電極では基準
電極電位が発生する。これをＥref.とする。センサ全体
の起電力Ｅは検知電極電位Ｅsen.と基準電極電位Ｅref.
との差によって表わされる。Then, like the detection electrode, a reference electrode potential is generated at the reference electrode. This is designated as Eref. The electromotive force E of the entire sensor is detected electrode potential Esen. And reference electrode potential Eref.
It is represented by the difference between and.
【００１７】[0017]
【数１】 Ｅ＝Ｅsen.−Ｅref. …（数１） 但し、基準電極電位Ｅref.は一定の温度の下では常に一
定の電位を示すことを前提としている。(Equation 1) E = Esen.-Eref. (Equation 1) However, it is premised that the reference electrode potential Eref. Always exhibits a constant potential under a constant temperature.
【００１８】また起電力Ｅと過酸化水素濃度との間に
は、次のネルンスト式が成立する。The following Nernst equation holds between the electromotive force E and the hydrogen peroxide concentration.
【００１９】[0019]
【数２】 Ｅ＝Ｅ0＋(ＲＴ／ｎＦ)ln［Ｈ2Ｏ2］ …（数２） すなわち、[Equation 2] E = E 0 + (RT / nF) ln [H 2 O 2 ] (Equation 2) That is,
【００２０】[0020]
【数３】 Ｅ＝Ｅ0＋２.３０３(ＲＴ／ｎＦ)log［Ｈ2Ｏ2］ …（数３） Ｅ0：標準酸化還元電位 Ｒ ：気体定数 Ｔ ：絶対温度（Ｋ） Ｆ ：ファラデー定数 であり、センサの使用可能な範囲では、起電力Ｅと過酸
化水素濃度の対数との間には直線関係が成り立つ。従っ
て、起電力Ｅを測定することによって未知濃度の過酸化
水素濃度を算出することができる。起電力Ｅはポテンシ
ャルスタット６によって測定される。[Equation 3] E = E 0 +2.303 (RT / nF) log [H 2 O 2 ] (Equation 3) E 0 : Standard redox potential R: Gas constant T: Absolute temperature (K) F: Faraday constant Therefore, in the usable range of the sensor, a linear relationship is established between the electromotive force E and the logarithm of the hydrogen peroxide concentration. Therefore, the hydrogen peroxide concentration of unknown concentration can be calculated by measuring the electromotive force E. The electromotive force E is measured by the potential stat 6.
【００２１】図３にセンサの基準電極におけるシール材
としてねじ型の治具８，９、例えば耐薬品性樹脂ポリイ
ミドを使用した一例を示す。ここではイオン導電体１と
基準電極３はセンサ治具ねじ蓋９のねじによって圧着さ
れている。イオン導電体１の検知電極２はＯ−リング１
０で固定されているので、センサ内部に水が浸入しない
構造になっている。治具８を使用することにより、イオ
ン導電体１及び基準電極３の交換が容易にできる様にな
る。またセンサ治具８，９に耐放射線性材料を使用する
ことにより、炉内への応用が可能となる。FIG. 3 shows an example in which screw type jigs 8 and 9, for example, chemical resistant resin polyimide is used as a sealing material in the reference electrode of the sensor. Here, the ionic conductor 1 and the reference electrode 3 are pressure-bonded by the screw of the sensor jig screw lid 9. The detection electrode 2 of the ionic conductor 1 is an O-ring 1
Since it is fixed at 0, it has a structure in which water does not enter the inside of the sensor. By using the jig 8, the ion conductor 1 and the reference electrode 3 can be easily replaced. Further, by using a radiation resistant material for the sensor jigs 8 and 9, application in a furnace becomes possible.
【００２２】図４にセンサの過酸化水素濃度に対する起
電力Ｅの変化について示す。FIG. 4 shows the change of the electromotive force E with respect to the hydrogen peroxide concentration of the sensor.
【００２３】この場合の測定の結果により、センサの使
用可能な過酸化水素の濃度の範囲、すなわち、数３に従
う応答濃度範囲は直線部分の約２ppbから１０００ppmで
あることが分かる。From the result of the measurement in this case, it can be seen that the range of usable hydrogen peroxide concentration of the sensor, that is, the response concentration range according to Equation 3 is about 2 ppb to 1000 ppm in the linear portion.
【００２４】図５は原子炉内に本発明であるセンサを設
置したものである。図６はボトムドレイン系に本発明で
あるセンサを設置したものである。これらの様に本セン
サを炉内または主配管に設置することにより炉水中の過
酸化水素濃度を正確に把握することができ、水素注入制
御技術の向上にもつながる。FIG. 5 shows the sensor of the present invention installed in a nuclear reactor. FIG. 6 shows the bottom drain system provided with the sensor of the present invention. By installing this sensor inside the furnace or in the main pipe like this, it is possible to accurately grasp the hydrogen peroxide concentration in the reactor water, which leads to improvement of hydrogen injection control technology.
【００２５】[0025]
【発明の効果】本発明によれば、沸騰水型原子炉一次冷
却水中の過酸化水素の濃度を主配管中で直接測定でき
る。従って本発明によれば、炉水中の正確な水質環境を
把握することができる。従って、炉内腐食環境の定量化
の確立につながり、原子炉の健全性及び安全性を確保
し、ひいては原子炉の長寿命化にもつながるため、エネ
ルギ資源確保の上でメリットが大きい。According to the present invention, the concentration of hydrogen peroxide in the boiling water reactor primary cooling water can be directly measured in the main pipe. Therefore, according to the present invention, an accurate water quality environment in the reactor water can be grasped. Therefore, the quantification of the in-reactor corrosion environment is established, the soundness and safety of the nuclear reactor are ensured, and the life of the nuclear reactor is prolonged, which is a great advantage in securing energy resources.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の一実施例に係る炉水用過酸化水素セン
サの断面図。FIG. 1 is a sectional view of a hydrogen peroxide sensor for reactor water according to an embodiment of the present invention.
【図２】本センサの原理を示す説明図。FIG. 2 is an explanatory diagram showing the principle of this sensor.
【図３】本発明の実施例を示す系統図。FIG. 3 is a system diagram showing an embodiment of the present invention.
【図４】本発明によるセンサの過酸化水素に対する応答
の特性図。FIG. 4 is a characteristic diagram of the response of a sensor according to the present invention to hydrogen peroxide.
【図５】本発明の実施例を示す系統図。FIG. 5 is a system diagram showing an embodiment of the present invention.
【図６】本発明の実施例を示す系統図。FIG. 6 is a system diagram showing an embodiment of the present invention.
１…イオン導電体、２…検知電極、３…基準電極、４…
絶縁体、５…リード線、６…ポテンシャルスタット、７
…指示変換計。1 ... Ionic conductor, 2 ... Detection electrode, 3 ... Reference electrode, 4 ...
Insulator, 5 ... Lead wire, 6 ... Potential stat, 7
… Indicating converter.
フロントページの続き (72)発明者 伊部 英史 茨城県日立市大みか町七丁目２番１号 株 式会社日立製作所エネルギー研究所内Front Page Continuation (72) Inventor Hidefumi Ibe 7-2 Omika-cho, Hitachi-shi, Ibaraki Hitachi Ltd. Energy Research Laboratory
Claims (8)
水素の分解反応によって生成する各種イオンが拡散する
イオン導電性物質を用いることを特徴とする炉水用過酸
化水素センサ。1. A hydrogen peroxide sensor for reactor water, which uses an ion conductive substance in which various ions produced by a decomposition reaction of hydrogen peroxide in the reactor water are diffused in a boiling water reactor.
としてＬａＦ3，β−ＰｂＦ2，ＰｂＳｎＦ4等の金属フ
ッ素化合物やＳｒＣｌ2等の金属塩素化合物や安定化ジ
ルコニア等の金属酸化物または各種ペロプスカイト型金
属を用いる炉水用過酸化水素センサ。2. The ionic conductive material according to claim 1, wherein a metal fluorine compound such as LaF 3 , β-PbF 2 , PbSnF 4 or the like, a metal chlorine compound such as SrCl 2 or a metal oxide such as stabilized zirconia or various kinds thereof. Hydrogen peroxide sensor for reactor water using perovskite type metal.
て、Ｓｃ，Ｔｉ，Ｖ，Ｃｒ，Ｍｎ，Ｆｅ，Ｃｏ，Ｎｉ，
Ｃｕ，Ｙ，Ｚｒ，Ｎｂ，Ｍｏ，Ｔｃ，Ｒｕ，Ｒｈ，Ｐ
ｄ，Ａｇ，Ｌａ，Ｃｅ，Ｐｒ，Ｎｄ，Ｐｍ，Ｓｍ，Ｅ
ｕ，Ｇｄ，Ｔｂ，Ｄｙ，Ｈｏ，Ｅｒ，Ｔｍ，Ｙｂ，Ｌ
ｕ，Ｈｆ，Ｔａ，Ｗ，Ｒｅ，Ｏｓ，Ｉｒ，Ａｃ，Ｔｈ，
Ｐａ，Ｕ，Ｎｐ，Ｐｕ，Ａｍ，Ｃｍ，Ｂｋ，Ｃｆ，Ｅ
ｓ，Ｆｍ，Ｍｄ，Ｎｏ，Ｌｒ，Ｓｂ，Ｂｉ，Ｓｒの金属
のいずれかを含む金属化合物を用いる炉水用過酸化水素
センサ。3. The metal compound according to claim 2, wherein the metal compound is Sc, Ti, V, Cr, Mn, Fe, Co, Ni,
Cu, Y, Zr, Nb, Mo, Tc, Ru, Rh, P
d, Ag, La, Ce, Pr, Nd, Pm, Sm, E
u, Gd, Tb, Dy, Ho, Er, Tm, Yb, L
u, Hf, Ta, W, Re, Os, Ir, Ac, Th,
Pa, U, Np, Pu, Am, Cm, Bk, Cf, E
A hydrogen peroxide sensor for reactor water, which uses a metal compound containing any of s, Fm, Md, No, Lr, Sb, Bi, and Sr metals.
の両側に電極を取り付け、それぞれの電極電位の差をセ
ンサの起電力として測定する炉水用過酸化水素センサ。4. The hydrogen peroxide sensor for reactor water according to claim 1, wherein electrodes are attached to both sides of the ionic conductive material, and a difference in electrode potential between the electrodes is measured as an electromotive force of the sensor.
ｃ，Ｔｉ，Ｖ，Ｃｒ，Ｍｎ，Ｆｅ，Ｃｏ，Ｎｉ，Ｃｕ，
Ｙ，Ｚｒ，Ｎｂ，Ｍｏ，Ｔｃ，Ｒｕ，Ｒｈ，Ｐｄ，Ａ
ｇ，Ｌａ，Ｃｅ，Ｐｒ，Ｎｄ，Ｐｍ，Ｓｍ，Ｅｕ，Ｇ
ｄ，Ｔｂ，Ｄｙ，Ｈｏ，Ｅｒ，Ｔｍ，Ｙｂ，Ｌｕ，Ｈ
ｆ，Ｔａ，Ｗ，Ｒｅ，Ｏｓ，Ｉｒ，Ａｃ，Ｔｈ，Ｐａ，
Ｕ，Ｎｐ，Ｐｕ，Ａｍ，Ｃｍ，Ｂｋ，Ｃｆ，Ｅｓ，Ｆ
ｍ，Ｍｄ，Ｎｏ，Ｌｒ，Ｓｂ，Ｂｉ，Ｓｒの金属の単体
及びその化合物を用いる炉水用過酸化水素センサ。5. The S according to claim 4, wherein the electrode is S.
c, Ti, V, Cr, Mn, Fe, Co, Ni, Cu,
Y, Zr, Nb, Mo, Tc, Ru, Rh, Pd, A
g, La, Ce, Pr, Nd, Pm, Sm, Eu, G
d, Tb, Dy, Ho, Er, Tm, Yb, Lu, H
f, Ta, W, Re, Os, Ir, Ac, Th, Pa,
U, Np, Pu, Am, Cm, Bk, Cf, Es, F
A hydrogen peroxide sensor for reactor water that uses a simple substance of metal of m, Md, No, Lr, Sb, Bi, Sr and a compound thereof.
電極とし、常に外部環境の影響を受けない電極電位を保
持する炉水用過酸化水素センサ。6. The hydrogen peroxide sensor for reactor water according to claim 4, wherein one of the electrodes is used as a reference electrode and an electrode potential that is not affected by the external environment is always maintained.
境より遮へいされている炉水用過酸化水素センサ。7. The hydrogen peroxide sensor for reactor water according to claim 6, wherein the reference electrode is shielded from the external environment.
無機固体を用いる炉水用過酸化水素センサ。8. The reference electrode according to claim 6,
Hydrogen peroxide sensor for reactor water using inorganic solid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7043812A JPH08240562A (en) | 1995-03-03 | 1995-03-03 | Hydrogen peroxide sensor for reactor water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7043812A JPH08240562A (en) | 1995-03-03 | 1995-03-03 | Hydrogen peroxide sensor for reactor water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08240562A true JPH08240562A (en) | 1996-09-17 |
Family
ID=12674161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7043812A Pending JPH08240562A (en) | 1995-03-03 | 1995-03-03 | Hydrogen peroxide sensor for reactor water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08240562A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009060878A1 (en) * | 2007-11-07 | 2009-05-14 | Nec Corporation | Electrode for electrochemical measurement device, and electrode for biosensor |
-
1995
- 1995-03-03 JP JP7043812A patent/JPH08240562A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009060878A1 (en) * | 2007-11-07 | 2009-05-14 | Nec Corporation | Electrode for electrochemical measurement device, and electrode for biosensor |
| JP5061375B2 (en) * | 2007-11-07 | 2012-10-31 | 日本電気株式会社 | Electrodes for electrochemical measuring devices and electrodes for biosensors |
| US8568578B2 (en) | 2007-11-07 | 2013-10-29 | Nec Corporation | Electrode for electrochemical measurement apparatus and electrode for biosensor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Sorokin et al. | Nonstoichiometric fluorides—Solid electrolytes for electrochemical devices: A review | |
| US9028671B2 (en) | Hydrogen sensing apparatus and method | |
| Booman et al. | Coulometric determination of uranium (VI) at controlled potential | |
| US3378478A (en) | Apparatus for continuous oxygen monitoring of liquid metals | |
| JPH0473095B2 (en) | ||
| Lehmani et al. | Oxidation kinetics of water and organic compounds by silver (II) using a potentiometric method | |
| US4985130A (en) | Amperometric method and apparatus | |
| Chubb et al. | Diffusion in uranium monocarbide | |
| JPH08240562A (en) | Hydrogen peroxide sensor for reactor water | |
| EP0096417B1 (en) | Apparatus for measuring dissolved hydrogen concentration | |
| Kim | In-situ electrochemical impedance measurement of oxide film formed on type 304 stainless steel in high-temperature water | |
| Etienne et al. | Local Evolution of pH with Time Determined by Shear Force‐based Scanning Electrochemical Microscopy: Surface Reactivity of Anodized Aluminium | |
| Matsuda et al. | HYDROGEN OVERVOLTAGE ON PLATINUM IN AQUEOUS SODIUM HYDROXIDE: Part Ⅰ. Rate of The Discharge Step | |
| Kurita et al. | Measuring apparatus for hydrogen permeation using oxide proton conductor | |
| JPH06265514A (en) | Sensor for water quality | |
| Tetot et al. | High temperature thermodynamics of the vanadium-oxygen system for 0≤ OV≤ 1.5: I. Determination of ΔG (O2)(OV) by electromotive force measurements | |
| RU2053506C1 (en) | Solid electrolyte sensor for gas analysis | |
| Kondo et al. | Development of electrochemical oxygen demand measurement cells using a diamond electrode | |
| JP3290809B2 (en) | Chlorine compound gas sensor | |
| Cao et al. | Study of Potentiometry for Monitoring Activity of GdCl3 in Molten LiCl-KCl Salt | |
| RU2774309C1 (en) | DEVICE FOR MEASURING THE REDOX POTENTIAL OF MOLTEN MIXTURES BASED ON THE LiF-BeF2 SYSTEM | |
| Marv et al. | Investigation of the corrosion of valve metals and alloys under the influence of plutonium | |
| Kalinina et al. | Determination of the conduction type and activity of solid electrolytes in the CaNd {sub 2} S {sub 4}-Nd {sub 2} S {sub 3} system | |
| Dutina | The Current State of the Art of Alkali Metal Analysis | |
| JPS61191978A (en) | Measurement for concentration of tritium in gaseous phase |