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United States of America Patent
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Dec 17, 2013
Grant Date -
Dec 22, 2011
app pub date -
Jun 20, 2011
filing date -
Feb 28, 1994
priority date (Note) -
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Abstract
An apparatus includes an atmospheric pressure ion source; a first vacuum stage and a second vacuum stage separated from the first vacuum stage by a vacuum partition; a first ion guide positioned within a first vacuum stage and arranged to receive ions from the atmospheric pressure ion source; a second ion guide positioned within a second vacuum stage downstream of the first vacuum stage from the atmospheric pressure ion source, the second ion guide being a multipole ion guide arranged to receive ions from the first ion guide; and a time-of-flight mass analyzer that includes an orthogonal pulsing region arranged to receive ions from the second ion guide.
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