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Method for detecting hydrogen peroxide

Foreign code F140008009
File No. P09-005US
Posted date Oct 30, 2014
Country United States of America
Application number 201113210166
Gazette No. 20110300636
Gazette No. 8871522
Date of filing Aug 15, 2011
Gazette Date Dec 8, 2011
Gazette Date Oct 28, 2014
Priority data
  • P2009-032466 (Feb 16, 2009) JP
  • 2010WO-JP52392 (Feb 10, 2010) WO
Title Method for detecting hydrogen peroxide
Abstract (US8871522)
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-.
Scope of claims [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.
  • Inventor, and Inventor/Applicant
  • HIRAOKA KENZO
  • UNIVERSITY OF YAMANASHI
IPC(International Patent Classification)
U.S. Cl./(Sub)
  • H01J027/02C
  • H01J027/02N
  • H01J049/14B
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