Mass spectrometry apparatus
First Claim
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1. A mass spectrometry apparatus comprising:
- an ion source which ionizes a sample under atmospheric pressure and outputs the ionized sample;
a differential pumping region, provided with apertures, for receiving under vacuum ions in the ionized sample from said ion source and outputting the ions;
an ion accelerating and focusing region, having a plurality of ion accelerating electrodes each having applied thereto a voltage, for accelerating and focusing under vacuum the ions from said differential pumping region; and
a mass spectrometer for detecting and analyzing under vacuum the ions from said accelerating and focusing region;
wherein at least one of said plurality of ion accelerating electrodes is a cylindrical electrode;
wherein said cylindrical electrode includes a part having a mesh structure.
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Abstract
A mass spectrometry apparatus which includes an ion source which ionizes a sample under atmospheric pressure and outputs the ionized sample, a differential pumping region, provided with apertures, for receiving under vacuum ions in the ionized sample from the ion source and outputting the ions and an ion accelerating and focusing region, having a plurality of ion accelerating electrodes each having applied thereto a voltage, for accelerating and focusing under vacuum the ions from the differential pumping region. The ions from the accelerating and focusing region are introduced under vacuum to a mass spectrometer which detects and analyzes the ions.
26 Citations
21 Claims
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1. A mass spectrometry apparatus comprising:
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an ion source which ionizes a sample under atmospheric pressure and outputs the ionized sample; a differential pumping region, provided with apertures, for receiving under vacuum ions in the ionized sample from said ion source and outputting the ions; an ion accelerating and focusing region, having a plurality of ion accelerating electrodes each having applied thereto a voltage, for accelerating and focusing under vacuum the ions from said differential pumping region; and a mass spectrometer for detecting and analyzing under vacuum the ions from said accelerating and focusing region; wherein at least one of said plurality of ion accelerating electrodes is a cylindrical electrode; wherein said cylindrical electrode includes a part having a mesh structure.
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2. A mass spectrometry apparatus comprising:
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an ion source which ionizes a sample under atmospheric pressure and outputs the ionized sample; a differential pumping region, provided with apertures, for receiving under vacuum ions in the ionized sample from said ion source and outputting the ions; an ion accelerating and focusing region, having a plurality of ion accelerating electrodes each having applied thereto a voltage, for accelerating and focusing under vacuum the ions from said differential pumping region; and a mass spectrometer for detecting and analyzing under vacuum the ions from said accelerating and focusing region; wherein a pressure in said differential pumping region is not lower than 10-3 Torr, and a pressure in said ion accelerating and focusing region is not higher than 10-3 Torr; wherein at least one of said plurality of ion accelerating electrodes is a cylindrical electrode; wherein said cylindrical electrode includes a part having a mesh structure.
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3. A mass spectrometry apparatus comprising:
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an ion source which ionizes a sample under atmospheric pressure and outputs the ionized sample; a differential pumping region, provided with apertures, for receiving under vacuum ions in the ionized sample from said ion source and outputting the ions; an ion accelerating and focusing region, having a plurality of ion accelerating electrodes each having applied thereto a voltage, for accelerating and focusing under vacuum the ions from said differential pumping region; and a mass spectrometer for detecting and analyzing under vacuum the ions from said accelerating and focusing region; wherein different voltages are applied independently to said ion accelerating electrodes; wherein at least one of said plurality of ion accelerating electrodes is a cylindrical electrode; wherein said cylindrical electrode includes a part having a mesh structure.
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4. A mass spectrometry apparatus comprising:
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an ion source which ionizes a sample under atmospheric pressure and outputs the ionized sample; a differential pumping region, provided with apertures, for receiving under vacuum ions in the ionized sample from said ion source and outputting the ions; an ion accelerating and focusing region, having a plurality of ion accelerating electrodes each having applied thereto a voltage, for accelerating and focusing under vacuum the ions from said differential pumping region; and a mass spectrometer for detecting and analyzing under vacuum the ions from said accelerating and focusing region; wherein at least one of said plurality of ion accelerating electrodes is provided with a heater.
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5. A mass spectrometry apparatus comprising:
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an ion source which ionizes a sample under atmospheric pressure and outputs the ionized sample; a differential pumping region, provided with apertures, for receiving under vacuum ions in the ionized sample from said ion source and outputting the ions; an ion accelerating and focusing region, having a plurality of ion accelerating electrodes each having applied thereto a voltage, for accelerating and focusing under vacuum the ions from said differential pumping region; and a mass spectrometer for detecting and analyzing under vacuum the ions from said accelerating and focusing region; wherein a pressure in said differential pumping region is not lower than 10-3 Torr, and a pressure in said ion accelerating and focusing region is not higher than 10-3 Torr; wherein at least one of said plurality of ion accelerating electrodes is provided with a heater.
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6. A mass spectrometry apparatus comprising:
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an ion source which ionizes a sample under atmospheric pressure and outputs the ionized sample; a differential pumping region, provided with apertures, for receiving under vacuum ions in the ionized sample from said ion source and outputting the ions; an ion accelerating and focusing region, having a plurality of ion accelerating electrodes each having applied thereto a voltage, for accelerating and focusing under vacuum the ions from said differential pumping region; and a mass spectrometer for detecting and analyzing under vacuum the ions from said accelerating and focusing region; wherein different voltages are applied independently to said ion accelerating electrodes; wherein at least one of said plurality of ion accelerating electrodes is provided with a heater.
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7. A mass spectrometry apparatus comprising:
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an ion source which ionizes a sample under atmospheric pressure and outputs the ionized sample; a differential pumping region, provided with a skimmer, for receiving under vacuum ions in the ionized sample output form said ion source and outputting the received ions through said skimmer; an ion accelerating region, having a plurality of ion accelerating electrodes, for accelerating under vacuum the ions output from said differential pumping region; and a mass spectrometer for detecting and analyzing under vacuum the ions from said accelerating region, wherein said plurality of ion accelerating electrodes are serially arranged between said skimmer and said mass spectrometer, each accelerating electrode having applied thereto a constant voltage which is different from other constant voltages applied to the other accelerating electrodes such that kinetic energy of the accelerated ions are continually increased toward the side of said mass spectrometer. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A mass spectrometry apparatus for analyzing multiple charged ions obtained from organic matter comprising:
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an ion source which ionizes a sample under atmospheric pressure and outputs the ionized sample; a differential pumping region, provided with a skimmer, for receiving under vacuum ions in the ionized sample output from said ion source and outputting the received ions through said skimmer; an ion accelerating region, having a plurality of ion accelerating electrodes, for accelerating under vacuum the ions output form said differential pumping region; and a mass spectrometer for detecting and analyzing under vacuum the ions from said accelerating region, wherein said plurality of ion accelerating electrodes are serially arranged between said skimmer and said mass spectrometer each accelerating electrode having applied thereto a constant voltage which is different from other constant voltages applied to the other accelerating electrodes such that the kinetic energy of the accelerated ions are continually increased toward the side of said mass spectrometer. - View Dependent Claims (21)
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Specification