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Method for detecting hydrogen peroxide

外国特許コード F140008009
整理番号 P09-005US
掲載日 2014年10月30日
出願国 アメリカ合衆国
出願番号 201113210166
公報番号 20110300636
公報番号 8871522
出願日 平成23年8月15日(2011.8.15)
公報発行日 平成23年12月8日(2011.12.8)
公報発行日 平成26年10月28日(2014.10.28)
優先権データ
  • 特願2009-032466 (2009.2.16) JP
  • 2010JP052392 (2010.2.10) WO
発明の名称 (英語) Method for detecting hydrogen peroxide
発明の概要(英語) The presence of hydrogen peroxide vapor is detected with high sensitivity.
Oxygen molecules in the air are ionized by electrons generated by a discharge plasma, thereby producing an oxygen molecule negative ion O2-.
The oxygen molecule negative ion O2- produced is supplied to a space in which a hydrogen peroxide molecule H2O2 is to be detected.
If a hydrogen peroxide molecule H2O2 is present, a cluster ion O2-(H2O2) of the oxygen molecule negative ion O2- and hydrogen peroxide molecule H2O2 is produced.
The hydrogen peroxide molecule H2O2, therefore, can be detected by mass spectrometry.
Other gas-phase negative ions such as chloride ion Cl- can be used besides the oxygen molecule negative ion O2-.
従来技術、競合技術の概要(英語) BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a method and apparatus for detecting hydrogen peroxide.
2. Description of the Related Art
Several methods of detecting hydrogen peroxide, which is contained in a solution, or gaseous hydrogen peroxide have already been proposed.
For example, there is the following literature:
Japanese Patent Application Laid-Open No. 2004-85374 H. Huang, P. K. Dasgupta "Renewable liquid film-based electrochemical sensor for gaseous hydroperoxides" Talanta 44 (1997) 605-615.
However, a highly sensitive method of detecting gaseous hydrogen peroxide ions using mass spectrometry has not been proposed at all.
The reason is that almost no parent (positive) ion H2O2+ is produced.
Even if such ions are produced, they readily decompose and are hindered by a signal ascribable to water vapor in the air, and detection is difficult.

特許請求の範囲(英語) [claim1]
1. A method of detecting hydrogen peroxide, comprising the steps of: generating an oxygen molecule negative ion O2-;
supplying the generated oxygen molecule negative ion O2- to a reaction space for clustering with a hydrogen peroxide molecule H2O2; and
introducing the ions inside said clustering reaction space to an analyzing apparatus and detecting at least whether or not a cluster ion O2-(H2O2) of the oxygen molecule negative ion O2- and hydrogen peroxide molecule H2O2 is present, thereby detecting at least whether or not hydrogen peroxide is present.
[claim2]
3. A method of detecting hydrogen peroxide, comprising the steps of: generating a chloride negative ion Cl-;
supplying the generated chloride negative ion Cl- to a reaction space for clustering with a hydrogen peroxide molecule H2O2; and
introducing the ions inside said clustering reaction space to an analyzing apparatus and detecting at least whether or not a cluster ion Cl-(H2O2) of the chloride negative ion Cl- and hydrogen peroxide molecule H2O2 is present, thereby detecting at least whether or not hydrogen peroxide is present.
[claim3]
2. A detection method according to claim 1, wherein electrons are generated, oxygen molecules in the air are ionized by the generated electrons and the oxygen molecule negative ion O2- is generated.
[claim4]
4. A detection method according to claim 2, wherein electrons are generated by an electrical discharge under atmospheric pressure or reduced pressure.
  • 発明者/出願人(英語)
  • HIRAOKA KENZO
  • UNIVERSITY OF YAMANASHI
国際特許分類(IPC)
米国特許分類/主・副
  • 436/135
  • 250/281
  • 250/282
  • 250/288
  • 436/173
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