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ELECTROCHEMICAL QUANTIFICATION METHOD FOR HYDROGEN PEROXIDE

Foreign code F110002810
File No. S2010-1047-N0
Posted date Apr 27, 2011
Country WIPO
International application number 2010JP052313
International publication number WO 2010/095630
Date of international filing Feb 17, 2010
Date of international publication Aug 26, 2010
Priority data
  • P2009-035181 (Feb 18, 2009) JP
Title ELECTROCHEMICAL QUANTIFICATION METHOD FOR HYDROGEN PEROXIDE
Abstract Disclosed is an electrochemical quantification method for hydrogen peroxide, which does not generate oxygen in an electrochemical reaction of hydrogen peroxide on a sensing electrode, and does not induce any reaction by dissolved oxygen contained in a test sample solution, and in which the sensing electrode is chemically stable against the reaction of hydrogen peroxide and the material of the electrode itself does not undergo oxidation, the influence by an interfering component that is contained in the test sample solution and interferes with the electrochemical reaction of hydrogen peroxide directly or interferes with the current measurement that relies only on the electrochemical reaction of hydrogen peroxide is suppressed, the sensitivity can be maintained at a high level steadily for a long period, and any complicated calibration procedure for a sensor is not required. Specifically disclosed is an electrochemical quantification method for hydrogen peroxide, which is characterized by comprising the steps of: oxidizing a target substance (which has been delivered to a sensor) through an enzymatic reaction to generate hydrogen peroxide; and measuring a current generated in an electrochemical reaction of hydrogen peroxide, wherein the current to be measured is a current generated upon the reduction of hydrogen peroxide on a sensing electrode having, formed therein, a catalyst layer comprising amorphous iridium oxide.
Scope of claims (In Japanese)
【請求項1】 センサへ運ばれた標的物質を酵素反応によって酸化して過酸化水素を生成する工程と、前記過酸化水素の電気化学反応で生じる電流を測定する工程とを含む過酸化水素の電気化学的定量法であって、
 非晶質の酸化イリジウムを含む触媒層を形成した検知極で前記過酸化水素が還元される電流を測定することを特徴とする過酸化水素の電気化学的定量法。

【請求項2】 検知極と対極と参照極を使用し、前記参照極を塩化カリウム飽和溶液の銀―塩化銀電極として定められる前記検知極の電位が+0.35V~-0.6Vの範囲となるように前記検知極の電位を制御することを特徴とする請求項1に記載の過酸化水素の電気化学的定量法。

【請求項3】 検知極と対極を使用し、前記検知極の電位が塩化カリウム飽和溶液の銀-塩化銀電極に対して+0.35V~-0.6Vの範囲となるように前記検知極と前記対極の間の電圧を制御することを特徴とする請求項1に記載の過酸化水素の電気化学的定量法。

【請求項4】 前記触媒層が非晶質の二酸化イリジウム、または非晶質と結晶質の二酸化イリジウムから構成された検知極を用いることを特徴とする請求項1から3のいずれかに記載の過酸化水素の電気化学的定量法。

【請求項5】 前記触媒層が非晶質の二酸化イリジウムまたは非晶質と結晶質の二酸化イリジウムと、タンタル、チタン、ニオブ、ジルコニウム、タングステンから選ばれた少なくとも1つ以上の金属の酸化物から構成された検知極を用いることを特徴とする請求項1から3のいずれかに記載の過酸化水素の電気化学的定量法。

【請求項6】 前記触媒層が非晶質の二酸化イリジウムと非晶質の五酸化二タンタル、または非晶質と結晶質の二酸化イリジウムと非晶質の五酸化二タンタルから構成された検知極を用いることを特徴とする請求項1から3のいずれかに記載の過酸化水素の電気化学的定量法。

【請求項7】 非晶質の酸化イリジウムを含む触媒層を形成した対極を用いることを特徴とする請求項1から6のいずれかに記載の過酸化水素の電気化学的定量法。
  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • THE DOSHISHA
  • Inventor
  • MORIMITSU, Masatsugu
IPC(International Patent Classification)
Specified countries AE(UTILITY MODEL),AG,AL(UTILITY MODEL),AM(PROVISIONAL PATENT)(UTILITY MODEL),AO(UTILITY MODEL),AT(UTILITY MODEL),AU,AZ(UTILITY MODEL),BA,BB,BG(UTILITY MODEL),BH(UTILITY MODEL),BR(UTILITY MODEL),BW(UTILITY MODEL),BY(UTILITY MODEL),BZ(UTILITY MODEL),CA,CH,CL(UTILITY MODEL),CN(UTILITY MODEL),CO(UTILITY MODEL),CR(UTILITY MODEL),CU(INVENTOR'S CERTIFICATE),CZ(UTILITY MODEL),DE(UTILITY MODEL),DK(UTILITY MODEL),DM,DO(UTILITY MODEL),DZ,EC(UTILITY MODEL),EE(UTILITY MODEL),EG(UTILITY MODEL),ES(UTILITY MODEL),FI(UTILITY MODEL),GB,GD,GE(UTILITY MODEL),GH(UTILITY CERTIFICATE),GM,GT(UTILITY MODEL),HN(UTILITY MODEL),HR(CONSENSUAL PATENT),HU(UTILITY MODEL),ID,IL,IN,IS,JP(UTILITY MODEL),KE(UTILITY MODEL),KG(UTILITY MODEL),KM,KN,KP(INVENTOR'S CERTIFICATE)(UTILITY MODEL),KR(UTILITY MODEL),KZ(PROVISIONAL PATENT)(UTILITY MODEL),LA,LC,LK,LR,LS(UTILITY MODEL),LT,LU,LY,MA,MD(UTILITY MODEL),ME,MG,MK,MN,MW,MX(UTILITY MODEL),MY(UTILITY-INNOVATION),MZ(UTILITY MODEL),NA,NG,NI(UTILITY MODEL),NO,NZ,OM(UTILITY MODEL),PE(UTILITY MODEL),PG,PH(UTILITY MODEL),PL(UTILITY MODEL),PT(UTILITY MODEL),RO,RS(PETTY PATENT),RU(UTILITY MODEL),SC,SD,SE,SG,SK(UTILITY MODEL),SL(UTILITY MODEL),SM,ST,SV(UTILITY MODEL),SY,TH(PETTY PATENT),TJ(UTILITY MODEL),TM(PROVISIONAL PATENT),TN,TR(UTILITY MODEL),TT(UTILITY CERTIFICATE),TZ,UA(UTILITY MODEL),UG(UTILITY CERTIFICATE),US,UZ(UTILITY MODEL),VC(UTILITY CERTIFICATE),VN(PATENT FOR UTILITY SOLUTION),ZA,ZM,ZW,EP(AT,BE,BG,CH,CY,CZ,DE,DK,EE,ES,FI,FR,GB,GR,HR,HU,IE,IS,IT,LT,LU,LV,MC,MK,MT,NL,NO,PL,PT,RO,SE,SI,SK,SM,TR),OA(BF(UTILITY MODEL),BJ(UTILITY MODEL),CF(UTILITY MODEL),CG(UTILITY MODEL),CI(UTILITY MODEL),CM(UTILITY MODEL),GA(UTILITY MODEL),GN(UTILITY MODEL),GQ(UTILITY MODEL),GW(UTILITY MODEL),ML(UTILITY MODEL),MR(UTILITY MODEL),NE(UTILITY MODEL),SN(UTILITY MODEL),TD(UTILITY MODEL),TG(UTILITY MODEL)),AP(BW(UTILITY MODEL),GH(UTILITY MODEL),GM(UTILITY MODEL),KE(UTILITY MODEL),LS(UTILITY MODEL),MW(UTILITY MODEL),MZ(UTILITY MODEL),NA(UTILITY MODEL),SD(UTILITY MODEL),SL(UTILITY MODEL),SZ(UTILITY MODEL),TZ(UTILITY MODEL),UG(UTILITY MODEL),ZM(UTILITY MODEL),ZW(UTILITY MODEL)),EA(AM,AZ,BY,KG,KZ,MD,RU,TJ,TM)

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