发明名称 |
Mass spectrometric apparatus and ion source |
摘要 |
A mass spectrometric apparatus capable of generating and detecting positive and negative ions stably at the same time. The apparatus preferably comprises: an opening through which a sample gas is introduced; an ion source to generate ions of the sample gas; and a mass spectrometer to analyze the mass of the generated ions. The ion source utilized with the mass spectrometric device comprises: a first needle electrode on which a voltage is applied in order to generate positive ions of the sample gas introduced through the opening; a first counter electrode having a first opening through which the sample gas and the positive ions pass; a second counter electrode disposed opposite the first counter electrode having a second opening through which the sample gas and the positive ions pass; a second needle electrode on which voltage is applied in order to generate negative ions of the sample gas; and a vent through which the sample gas is ejected. Generated ions are then introduced into a vacuum region via an aperture and subjected to mass analysis.
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申请公布号 |
US2005199799(A1) |
申请公布日期 |
2005.09.15 |
申请号 |
US20040009485 |
申请日期 |
2004.12.13 |
申请人 |
HITACHI, LTD. |
发明人 |
TAKADA YASUAKI;NAGANO HISASHI;SUGA MASAO;KASHIMA HIDEO;WAKI IZUMI |
分类号 |
G01N27/62;H01J27/08;H01J49/10;H01J49/12;H01J49/26;(IPC1-7):H01J49/10 |
主分类号 |
G01N27/62 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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