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Ionization analysis method and device

外国特許コード F110005748
整理番号 P08-019EP
掲載日 2011年9月13日
出願国 欧州特許庁(EPO)
出願番号 09770022
公報番号 2295959
公報番号 2295959
出願日 平成21年6月4日(2009.6.4)
公報発行日 平成23年3月16日(2011.3.16)
公報発行日 平成28年4月6日(2016.4.6)
国際出願番号 JP2009060653
国際公開番号 WO2009157312
国際出願日 平成21年6月4日(2009.6.4)
国際公開日 平成21年12月30日(2009.12.30)
優先権データ
  • 2009JP060653 (2009.6.4) WO
  • 特願2008-169679 (2008.6.27) JP
発明の名称 (英語) Ionization analysis method and device
発明の概要(英語) It is arranged so that ions can be analyzed accurately and with high sensitivity.
A first electrode 11 is provided on the outer periphery of a dielectric cylindrical body 13 and a second electrode 12 is placed inside the cylindrical body 13 leaving a clearance between itself and the inner surface of the cylindrical body 13.
When an AC high voltage is impressed across the first electrode 11 and second electrode 12, a barrier discharge occurs within the cylindrical body 13.
When a distal end portion 12a of the second electrode 12 projects outwardly from the distal end of the cylindrical body 13, a thermal equilibrium plasma P having a low electron temperature is generated outwardly of the distal end of the cylindrical body 13 without a plasma jet ascribable to the barrier discharge emerging outwardly from the distal end of the cylindrical body 13.
By exposing a sample S to the thermal equilibrium plasma P, particles (atoms, molecules) desorbed from the sample S undergo soft ionization without being decomposed or polymerized.
The ions generated are introduced to a mass analyzer 50.
特許請求の範囲(英語) [claim1]
1. An ionization apparatus comprising: a first cylindrical body comprising a dielectric; a first electrode provided on the outer side of said first cylindrical body in the vicinity of a distal end portion thereof; and a second electrode disposed inside said first cylindrical body in the vicinity of the center thereof defining a clearance between itself and an inner surface of said first cylindrical body, extending along the longitudinal direction of said first cylindrical body ; wherein said second electrode is a second cylindrical body for supplying a sample gas or for introducing generated ions and has a distal end that is open; characterised in that said second electrode projects outwardly from the distal end of said cylindrical body passing a position at which said first electrode is provided.
[claim2]
2. An ionization apparatus according to claim 1, wherein said second electrode is a slender tube made of metal.
[claim3]
3. An ionization apparatus according to claim 1, wherein said second electrode is a capillary for supplying a sample gas, the sample gas being supplied from a rear end thereof.
[claim4]
4. An ionization apparatus according to claim 1, wherein said second electrode is a capillary for introducing ions, the capillary communicating with the interior of a mass analyzer.
[claim5]
5. An ionization apparatus according to claim 1, wherein said second electrode is formed as a metal portion on the surface of an inner cylindrical body, which exhibits an insulating property, at least from the position of said first electrode to the distal end.
[claim6]
6. An ionization apparatus according to any one of claims 1 to 5, further comprising a mesh electrode disposed outwardly of a distal end of said second electrode in close proximity to this distal end.
[claim7]
7. An ionization analysis apparatus comprising the ionization apparatus, which is set forth in any one of claims 1 to 6, and a mass analyzer.
[claim8]
8. An ionization method using the ionization apparatus set forth in any one of claims 1 to 6 comprising: impressing an AC voltage across said first and second electrodes; and exposing a sample to a charged gas stream generated from the distal end of said first cylindrical body.
[claim9]
9. An ionization method according to claim 8, further comprising impressing a DC voltage across said first and second electrodes and generating a positive-ion rich or negative-ion rich charge gas current in accordance with polarity of this DC voltage.
[claim10]
10. An ionization method according to claim 9, further comprising applying a voltage having a polarity the same as that of said DC voltage and an absolute value larger than that of said DC voltage to a conductor placed rearwardly of the sample.
[claim11]
11. An ionization method according to claim 8, further comprising applying a positive or negative DC voltage to a mesh electrode disposed outwardly of the distal end of said second electrode in close proximity to this distal end.
[claim12]
12. An ionization method according to any one of claims 8 to 11, further comprising spraying fine droplets of a solvent onto the sample and promoting desorption of the sample.
[claim13]
13. An ionization method according to any one of claims 8 to 11, further comprising promoting desorption of the sample by heating the sample.
[claim14]
14. An ionization method according to any one of claims 8 to 11, further comprising promoting desorption of the sample by irradiating the sample with laser light.
[claim15]
15. An ionization analysis method comprising introducing sample ions, which have been produced by the ionization method set forth in any one of claims 8 to 14, to an analyzing apparatus.
  • 出願人(英語)
  • UNIVERSITY OF YAMANASHI
  • 発明者(英語)
  • HIRAOKA KENZO
  • CHEN LEE CHUIN
国際特許分類(IPC)
欧州特許分類/主・副
  • H01J049/10B
指定国 Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR
上記の特許・技術に関心のある方は、下記問合せ先にご相談下さい。

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