JPH038509B2 - - Google Patents
Info
- Publication number
- JPH038509B2 JPH038509B2 JP57136001A JP13600182A JPH038509B2 JP H038509 B2 JPH038509 B2 JP H038509B2 JP 57136001 A JP57136001 A JP 57136001A JP 13600182 A JP13600182 A JP 13600182A JP H038509 B2 JPH038509 B2 JP H038509B2
- Authority
- JP
- Japan
- Prior art keywords
- hydrogen peroxide
- cathode
- anode
- measured
- electrodes
- 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 - Lifetime
Links
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 66
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 22
- NDVLTYZPCACLMA-UHFFFAOYSA-N silver oxide Chemical compound [O-2].[Ag+].[Ag+] NDVLTYZPCACLMA-UHFFFAOYSA-N 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 12
- 229910052697 platinum Inorganic materials 0.000 claims description 11
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 7
- 229910052709 silver Inorganic materials 0.000 claims description 7
- 239000004332 silver Substances 0.000 claims description 7
- 229910001923 silver oxide Inorganic materials 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 6
- 238000000691 measurement method Methods 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910000640 Fe alloy Inorganic materials 0.000 claims description 3
- 229910021607 Silver chloride Inorganic materials 0.000 claims description 3
- 229910052797 bismuth Inorganic materials 0.000 claims description 3
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 3
- 229910017052 cobalt Inorganic materials 0.000 claims description 3
- 239000010941 cobalt Substances 0.000 claims description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 229910052741 iridium Inorganic materials 0.000 claims description 3
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910052763 palladium Inorganic materials 0.000 claims description 3
- 229910052703 rhodium Inorganic materials 0.000 claims description 3
- 239000010948 rhodium Substances 0.000 claims description 3
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims description 3
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 claims description 3
- 239000003792 electrolyte Substances 0.000 description 11
- 238000005259 measurement Methods 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 230000035945 sensitivity Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 4
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000004401 flow injection analysis Methods 0.000 description 2
- QRMZSPFSDQBLIX-UHFFFAOYSA-N homovanillic acid Chemical compound COC1=CC(CC(O)=O)=CC=C1O QRMZSPFSDQBLIX-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000002795 fluorescence method Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- HWYHZTIRURJOHG-UHFFFAOYSA-N luminol Chemical compound O=C1NNC(=O)C2=C1C(N)=CC=C2 HWYHZTIRURJOHG-UHFFFAOYSA-N 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000003918 potentiometric titration Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000002798 spectrophotometry method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/404—Cells with anode, cathode and cell electrolyte on the same side of a permeable membrane which separates them from the sample fluid, e.g. Clark-type oxygen sensors
- G01N27/4045—Cells with anode, cathode and cell electrolyte on the same side of a permeable membrane which separates them from the sample fluid, e.g. Clark-type oxygen sensors for gases other than oxygen
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Molecular Biology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Description
【発明の詳細な説明】
本発明は、被測定液中の過酸化水素濃度の高感
度な測定方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a highly sensitive method for measuring hydrogen peroxide concentration in a liquid to be measured.
従来より、過酸化水素濃度の測定方法として電
位差滴定法、吸光光度法などが知られているが、
いずれも感度、選択性、測定の迅速性、試薬の使
用量等の面で問題があり、またコンパクトな検出
器として組み上げることが困難なため、自動測定
器などには使用されていない。また、高感度な分
析を行なう場合はルミノールを用いる化学発光法
やホモワニリン酸を用いる蛍光法があり、その感
度はppbオーダーに及ぶが、測定には特別の光学
系を要し、装置が複雑になる。 Conventionally, potentiometric titration method, spectrophotometry method, etc. are known as methods for measuring hydrogen peroxide concentration.
All of them have problems in terms of sensitivity, selectivity, rapidity of measurement, amount of reagent used, etc., and are difficult to assemble into a compact detector, so they are not used in automatic measuring instruments. In addition, for highly sensitive analysis, there are chemiluminescence methods using luminol and fluorescence methods using homovanillic acid.The sensitivity of these methods reaches the ppb order, but measurement requires a special optical system and the equipment is complicated. Become.
更に、臨床化学や食品関係などで用いられる電
気化学的な過酸化水素測定法として、一定直流電
圧を加えた２箇の電極間に流れる電流値を測定す
る方法（特公昭45−35360など）が知られている。
この方法は一般に陽極に白金電極、陰極に銀電極
を選び、例えばKC電解液のもとで陽極及び陰
極間に0.4〜0.7Vの電圧を印加することによつて、
陽極側で H2O2→O2＋2H+＋2e
陰極側で O2＋2H2O＋4e→4OH-
なる反応を生じさせ、H2O2の濃度に対応して両
極間に流れる酸化還元電流を測定するものであ
る。この方法は測定を迅速に行なうことができる
うえ、特別の試薬を必要としない等の長所を有す
るが、所定の電圧を印加するための装置が複雑と
なり、また感度の点でも一般的にはppmオーダー
以下は測定し難い問題があり、いくつかの妨害物
質が存在する。 Furthermore, as an electrochemical hydrogen peroxide measurement method used in clinical chemistry and food-related fields, there is a method that measures the value of the current flowing between two electrodes to which a constant DC voltage is applied (e.g., Japanese Patent Publication No. 1973-35360). Are known.
This method generally selects a platinum electrode for the anode and a silver electrode for the cathode, and applies a voltage of 0.4 to 0.7 V between the anode and cathode under a KC electrolyte, for example, to generate H 2 O 2 on the anode side. →O 2 +2H + +2e The reaction O 2 +2H 2 O+4e→4OH - occurs on the cathode side, and the redox current flowing between the two electrodes is measured in response to the concentration of H 2 O 2 . This method has the advantage of being able to perform measurements quickly and does not require special reagents, but the equipment for applying the prescribed voltage is complicated and the sensitivity is generally lower than ppm. Measurements below the order of magnitude are difficult to measure, and there are several interfering substances.
本発明者は、上記事情に鑑み、応答が迅速で、
構成及び操作も簡単で、かつ高感度の過酸化水素
測定法につき鋭意研究を行なつた結果、白金、
金、銀、パラジウム，ロジウム，イリジウム，
鉛、ビスマス，マンガン−鉄合金、ニツケル，コ
バルト、銅及び鉄から選ばれた過酸化水素と接触
することによりこれを分解する陽極と、酸化銀又
は塩化銀からなる過酸化水素と接触することによ
り還元される陰極とから構成される両極を用いて
アルカリ性雰囲気でこれら両極に被測定液を接触
させ、この時両極間に流れる電流を測定し、この
電流値から被測定液中の過酸化水素濃度を求める
ことにより、上記目的が効果的に達成されること
を知見し、本発明をなすに至つたものである。 In view of the above circumstances, the present inventors are quick to respond and
As a result of intensive research into a highly sensitive hydrogen peroxide measurement method that is easy to configure and operate, platinum,
gold, silver, palladium, rhodium, iridium,
An anode that decomposes hydrogen peroxide selected from lead, bismuth, manganese-iron alloy, nickel, cobalt, copper and iron by contact with hydrogen peroxide, and hydrogen peroxide consisting of silver oxide or silver chloride. The liquid to be measured is brought into contact with the two electrodes in an alkaline atmosphere, and the current flowing between the two electrodes is measured. From this current value, the concentration of hydrogen peroxide in the liquid to be measured is determined. The inventors have discovered that the above object can be effectively achieved by finding the following, and have thus come up with the present invention.
即ち、上記方法によれば、過酸化水素はアルカ
リ性雰囲気のもとでは、例えば白金表面で接触的
に分解され、
陽極側で H2O2→O2＋2H+＋2e …(1)
なる反応を生じ、また酸化銀は過酸化水素によつ
て還元され、
陰極側で Ag2O＋2H2O＋2e→2Ag＋
2OH- …(2)
なる反応を生じ、この時両極間に流れる電流を測
定することにより、過酸化水素濃度を求めること
ができるものである。 That is, according to the above method, hydrogen peroxide is catalytically decomposed, for example, on the platinum surface in an alkaline atmosphere, and the following reaction occurs on the anode side: H 2 O 2 →O 2 +2H + +2e...(1) , silver oxide is reduced by hydrogen peroxide, and on the cathode side Ag 2 O + 2H 2 O + 2e → 2Ag +
2OH - ...(2) A reaction occurs, and the hydrogen peroxide concentration can be determined by measuring the current flowing between the two electrodes.
以下、本発明の一実施例につき図面を参照して
説明する。 Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
第１図において１はセラミツク等で形成された
有底円筒状の多孔質管で、内部にアルカリ性電解
液２及び陰極３が収容されており、このアルカリ
性電解液２が少量ずつ多孔質管１中を浸透して多
孔質管１の表面に浸潤するようになつている。こ
こで、陰極３は塩化銀及び酸化銀から選ばれる過
酸化水素と接触して還元される物質よりなり、こ
れらを粉体のまま又は固体膜等の適宜形状に形成
したものなどが使用される。なお、陰極３には多
孔質管１外から白金、銀などで形成された陰極リ
ード線４が接続されている。また、アルカリ性電
解液としては、水酸化カリウム水溶液、水酸化ナ
トリウム水溶液等が好ましく、この電解質により
測定系をPH９以上のアルカリ性雰囲気中に保つ
ものである。更に、５は多孔質管１外周壁に巻着
された陽極である。この陽極としては白金、銀、
金、パラジウム，ロジウム，イリジウム，鉛、ビ
スマス，マンガン−鉄合金、ニツケル，コバル
ト、銅及び鉄から選ばれる過酸化水素と接触して
これを分解するものが使用できるが、特に安全
性、耐薬品性の点で、白金が好ましい。また陽極
の形状は線状、板状、多孔体状等に形成すること
ができ、この陽極５には白金、銀などで形成され
た陽極リード線６が接続されている。なお、７は
上記多孔質管１を収容するフロースルー電極用ボ
デイーであり、測定用サンプルを連続フローでサ
ンプリングして測定するための外容器である。ま
た、８は前記陰極リード線４と陽極リード線６と
に接続され、両極間に流れる電流値を測定する電
流計である。この場合、電流計としてはミリアン
ペア計、マイクロアンペア計、検流計等が使用で
きる。 In Fig. 1, reference numeral 1 denotes a bottomed cylindrical porous tube made of ceramic or the like, in which an alkaline electrolyte 2 and a cathode 3 are housed. The porous tube 1 is designed to penetrate into the surface of the porous tube 1. Here, the cathode 3 is made of a substance selected from silver chloride and silver oxide that is reduced when it comes into contact with hydrogen peroxide, and these are used as powder or formed into an appropriate shape such as a solid film. . Note that a cathode lead wire 4 made of platinum, silver, or the like is connected to the cathode 3 from outside the porous tube 1. Further, as the alkaline electrolyte, a potassium hydroxide aqueous solution, a sodium hydroxide aqueous solution, etc. are preferable, and this electrolyte maintains the measurement system in an alkaline atmosphere with a pH of 9 or more. Furthermore, 5 is an anode wrapped around the outer peripheral wall of the porous tube 1. Platinum, silver,
A material selected from gold, palladium, rhodium, iridium, lead, bismuth, manganese-iron alloy, nickel, cobalt, copper and iron that decomposes on contact with hydrogen peroxide can be used, but it is particularly safe and chemically resistant. From the viewpoint of properties, platinum is preferred. Further, the shape of the anode can be formed into a linear shape, a plate shape, a porous body shape, etc., and an anode lead wire 6 made of platinum, silver, etc. is connected to the anode 5. Note that 7 is a flow-through electrode body that accommodates the porous tube 1, and is an outer container for sampling and measuring a measurement sample in a continuous flow. Further, 8 is an ammeter that is connected to the cathode lead wire 4 and the anode lead wire 6 and measures the value of the current flowing between the two electrodes. In this case, a milliampere meter, microampere meter, galvanometer, etc. can be used as the ammeter.
上記構成の測定装置においては、ポンプ９によ
つて過酸化水素を含む試料がボデイー７内に送給
されると、陰極と陽極とはいずれも常にアルカリ
性電解液２と接触しているため、陽極５表面で前
記(1)式の反応が生じ、また多孔質管１中を通つて
陰極３に至つた試料中の過酸化水素によつて前記
(2)式の反応が生じて、両極３，５間に過酸化水素
濃度に対応する電流が流れ、この流れる電流を電
流計８によつて測定し、この電流値から過酸化水
素濃度が求まるものである。なお、この装置によ
り測定した電流値と過酸化水素濃度との関係を第
２図のグラフに示した。 In the measuring device configured as described above, when a sample containing hydrogen peroxide is fed into the body 7 by the pump 9, the cathode and the anode are both constantly in contact with the alkaline electrolyte 2, so the anode The reaction of formula (1) above occurs on the surface of the porous tube 1, and the hydrogen peroxide in the sample that has passed through the porous tube 1 and reaches the cathode 3 causes the above reaction to occur.
The reaction of equation (2) occurs, and a current corresponding to the hydrogen peroxide concentration flows between the electrodes 3 and 5. This flowing current is measured by an ammeter 8, and the hydrogen peroxide concentration is determined from this current value. It is something. The graph in FIG. 2 shows the relationship between the current value measured by this device and the hydrogen peroxide concentration.
この方法は、両極間に印加電圧を加える従来の
方法とは異なり、異種電極間で形成された電池作
用を利用するガルバニツクな原理にもとづくもの
で、この場合には印加電圧が不要なため装置が簡
素化でき、小型化が可能で、また印加電圧を用い
る方法と比較しても同等以上の出力が得られ、
1ppm以下の濃度の測定がμAのオーダーの電流値
で出力されるため、直接電流計で測定でき、ポー
ラログラフと同等以上の高感度であり、広い応用
の可能性を有するものである。 Unlike the conventional method of applying voltage between two electrodes, this method is based on a galvanic principle that utilizes the cell action formed between different electrodes. It can be simplified and miniaturized, and it can provide the same or higher output compared to methods that use applied voltage.
Since the measurement of concentrations of 1 ppm or less is output as a current value on the order of μA, it can be directly measured with an ammeter, has a high sensitivity equal to or higher than that of a polarograph, and has a wide range of potential applications.
第３図は本発明測定方法の実施に使用する他の
測定装置を示すもので、装置を隔膜電極型に構成
したものである。第３図中１０は0.03μの孔径を
有する厚さ20〜30μのポリカーボネート等の隔膜
１１によつて底部が閉塞された円筒状ボデイー
で、内部に例えば１〜２規定水酸化カリウム水溶
液によるアルカリ性電解液２が入つており、この
アルカリ性電解液２中に酸化銀を錠剤成型器で固
体膜に固めた陰極３及び白金からなる陽極５が収
容されている。なお、陰極３には固体膜成型を安
定なものにするために銀等を混入させることもで
きる。また、陽極５の形状は陰極３と接触しない
かぎり自由に選び得る。 FIG. 3 shows another measuring device used in carrying out the measuring method of the present invention, and the device is constructed as a diaphragm electrode type. In Fig. 3, reference numeral 10 denotes a cylindrical body whose bottom is closed by a diaphragm 11 made of polycarbonate or the like with a thickness of 20 to 30 μ and a pore size of 0.03 μ. A cathode 3 made of silver oxide solidified into a solid film using a tablet molding machine and an anode 5 made of platinum are housed in this alkaline electrolytic solution 2. Incidentally, silver or the like may be mixed into the cathode 3 in order to stabilize solid film formation. Further, the shape of the anode 5 can be freely selected as long as it does not come into contact with the cathode 3.
上記装置においては、隔膜１１が過酸化水素を
透過するもの、例えば孔径0.03μ、厚さ20〜30μの
ポリカーボネート膜等で形成されているため、ボ
デイー１０を被測定液１２中に挿入すると、被測
定液１２中の過酸化水素が隔膜１１を透過して陰
極３と陽極５とに接触し、前記(1)，(2)式の反応が
おき、この際に両極間に流れる電流を電流計８で
測定するもので、隔膜１１を適宜選択することに
より、共存物質の影響を除くことができると共
に、両電極３，５の汚れも少ないものである。 In the above device, the diaphragm 11 is made of a material that permeates hydrogen peroxide, such as a polycarbonate membrane with a pore size of 0.03μ and a thickness of 20 to 30μ, so that when the body 10 is inserted into the liquid to be measured 12, the Hydrogen peroxide in the measurement liquid 12 passes through the diaphragm 11 and comes into contact with the cathode 3 and anode 5, and the reactions of formulas (1) and (2) occur, and at this time, the current flowing between the two electrodes is measured by an ammeter. By appropriately selecting the diaphragm 11, the influence of coexisting substances can be removed, and both electrodes 3 and 5 are less contaminated.
第４図は本発明測定方法をフローインジエクシ
ヨンアナリシスの検出器に用いた場合を示すもの
で、第４図中３及び５はそれぞれキヤリヤー溶液
流路中に所定間隔離間して配設された酸化銀から
なる陰極及び白金からなる陽極である。また、１
３はアルカリ電解液ポンプ、１４はサンプルを導
入するサンプルインジエクター、１５はキヤリア
ー液ポンプ、１６はキヤリアー液等が流れる導管
である。 Figure 4 shows the case where the measurement method of the present invention is used in a detector for flow injection analysis. In Figure 4, 3 and 5 are respectively placed in the carrier solution flow path with a predetermined distance between them. A cathode made of silver oxide and an anode made of platinum. Also, 1
3 is an alkaline electrolyte pump, 14 is a sample injector for introducing a sample, 15 is a carrier liquid pump, and 16 is a conduit through which carrier liquid and the like flow.
上記装置においては、サンプルがキヤリアー溶
液中に断続的に導入されると共に、アルカリ電解
液ポンプ１３によつて例えば１〜２モル濃度の水
酸化カリウム水溶液よりなるアルカリ電解液がパ
イプ１６内に送給され、両極３，５がアルカリ電
解液に浸漬された状態でサンプルが両極３，５に
接触し、この時両極３，５間に流れる電流を電流
計８で測定するものである。なお、この場合はア
ルカリ電解液は電極近傍に保持することなくキヤ
リアー溶液と共に流出される。 In the above device, the sample is intermittently introduced into the carrier solution, and an alkaline electrolyte, such as an aqueous potassium hydroxide solution with a 1 to 2 molar concentration, is fed into the pipe 16 by the alkaline electrolyte pump 13. A sample contacts both electrodes 3 and 5 with both electrodes 3 and 5 immersed in an alkaline electrolyte, and the current flowing between both electrodes 3 and 5 at this time is measured with an ammeter 8. Note that in this case, the alkaline electrolyte is not held near the electrode and is flowed out together with the carrier solution.
以上説明したように、本発明の過酸化水素測定
方法は、過酸化水素と接触することによりこれを
分解する特定物質からなる陽極と、過酸化水素と
接触することにより還元される特定物質からなる
陰極とをアルカリ性雰囲気中で過酸化水素を含有
する被測定液に接触させ、これら両極間に流れる
電流を測定することにより、被測定液中の過酸化
水素濃度を求めるよう構成したので、印加電圧が
不要なものになり、装置を簡単化し得、しかもこ
の装置の感度は優れたものであり、広い応用の可
能性を有するものである。 As explained above, the hydrogen peroxide measurement method of the present invention consists of an anode made of a specific substance that decomposes hydrogen peroxide when it comes into contact with it, and a specific substance that reduces it when it comes into contact with hydrogen peroxide. By bringing the cathode into contact with a liquid to be measured containing hydrogen peroxide in an alkaline atmosphere and measuring the current flowing between these two electrodes, the concentration of hydrogen peroxide in the liquid to be measured is determined. This eliminates the need for the device, simplifies the device, and furthermore, the device has excellent sensitivity and has a wide range of possibilities for application.
第１図は本発明の実施に使用するフロースルー
型過酸化水素測定装置の概略断面図、第２図は同
装置を用いて測定した電流値と過酸化水素濃度と
の関係を示すグラフ、第３図は本発明の実施に使
用する隔膜電極型過酸化水素測定装置を示す概略
図、第４図は本発明に係る過酸化水素測定装置を
フローインジエクシヨンアナリシス装置に組み込
んだ態様を示す概略説明図である。
２……アルカリ性電解液、３……陰極、５……
陽極、８……電流計、１２……被測定液。
FIG. 1 is a schematic cross-sectional view of a flow-through type hydrogen peroxide measuring device used in carrying out the present invention, FIG. 2 is a graph showing the relationship between the current value measured using the same device and the hydrogen peroxide concentration, and FIG. FIG. 3 is a schematic diagram showing a diaphragm electrode type hydrogen peroxide measuring device used in carrying out the present invention, and FIG. 4 is a schematic diagram showing an embodiment in which the hydrogen peroxide measuring device according to the present invention is incorporated into a flow injection analysis device. It is an explanatory diagram. 2... Alkaline electrolyte, 3... Cathode, 5...
Anode, 8... Ammeter, 12... Liquid to be measured.
Claims (1)
ジウム，鉛、ビスマス，マンガン−鉄合金、ニツ
ケル，コバルト、銅及び鉄から選ばれた陽極と、
酸化銀又は塩化銀からなる陰極とをアルカリ性雰
囲気中で過酸化水素を含有する被測定液に接触さ
せ、これら両極間に流れる電流を測定することに
より被測定液中の過酸化水素濃度を求めることを
特徴とする過酸化水素測定方法。 ２ 陽極が白金からなり、陰極が酸化銀からなる
特許請求の範囲第１項記載の過酸化水素測定方
法。[Claims] 1. An anode selected from platinum, gold, silver, palladium, rhodium, iridium, lead, bismuth, manganese-iron alloy, nickel, cobalt, copper, and iron;
The concentration of hydrogen peroxide in the liquid to be measured is determined by bringing a cathode made of silver oxide or silver chloride into contact with a liquid to be measured containing hydrogen peroxide in an alkaline atmosphere and measuring the current flowing between these two electrodes. A hydrogen peroxide measurement method characterized by: 2. The method for measuring hydrogen peroxide according to claim 1, wherein the anode is made of platinum and the cathode is made of silver oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57136001A JPS5926049A (en) | 1982-08-04 | 1982-08-04 | Method for measuring hydrogen peroxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57136001A JPS5926049A (en) | 1982-08-04 | 1982-08-04 | Method for measuring hydrogen peroxide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5926049A JPS5926049A (en) | 1984-02-10 |
| JPH038509B2 true JPH038509B2 (en) | 1991-02-06 |
Family
ID=15164865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57136001A Granted JPS5926049A (en) | 1982-08-04 | 1982-08-04 | Method for measuring hydrogen peroxide |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5926049A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1009053A5 (en) * | 1995-01-26 | 1996-11-05 | Universiteit Gent Vakgroep Tex | MEASURING PROBE SUITABLE FOR CONTINUED TO MEASURE HYDROGEN CONCENTRATION IN A bleaching bath. |
| US6129831A (en) * | 1995-01-26 | 2000-10-10 | Universiteit Gent - Vakgroep Textielkunde | Hydrogen peroxide sensor |
| JP5135548B2 (en) * | 2008-09-02 | 2013-02-06 | 日本電気株式会社 | Electrodes for electrochemical measuring devices and electrodes for biosensors |
-
1982
- 1982-08-04 JP JP57136001A patent/JPS5926049A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5926049A (en) | 1984-02-10 |
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