MASS FILTER HAVING REDUCED CONTAMINATION

MASS FILTER HAVING REDUCED CONTAMINATION

A method of mass filtering ions is disclosed comprising: providing a first, AC-only, mass filter 2; providing a second mass filter 4 downstream of the first mass filter; applying a first AC voltage 8 to electrodes of the first mass filter so as to radially confine ions between the electrodes, and ap...

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Hauptverfasser: LANGRIDGE, David J, GREEN, Martin Raymond
Format: Patent
Sprache:eng ; fre ; ger
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BASIC ELECTRIC ELEMENTS
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
ELECTRICITY
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creator LANGRIDGE, David J
GREEN, Martin Raymond
description A method of mass filtering ions is disclosed comprising: providing a first, AC-only, mass filter 2; providing a second mass filter 4 downstream of the first mass filter; applying a first AC voltage 8 to electrodes of the first mass filter so as to radially confine ions between the electrodes, and applying a second AC voltage 10 between electrodes of the first mass filter 2 so as to radially excite some of said ions such that these ions are not transmitted; and using the second mass filter 4 to mass filter ions; wherein at any given time the second mass filter 4 only transmits ions having a first range of mass to charge ratios and filters out all other ions; and wherein the step of applying the at least one second AC voltage 10 to electrodes of the first mass filter 2 radially excites ions such that at least some ions having mass to charge ratios above said first range are not transmitted into the second mass filter.
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and using the second mass filter 4 to mass filter ions; wherein at any given time the second mass filter 4 only transmits ions having a first range of mass to charge ratios and filters out all other ions; and wherein the step of applying the at least one second AC voltage 10 to electrodes of the first mass filter 2 radially excites ions such that at least some ions having mass to charge ratios above said first range are not transmitted into the second mass filter.</description><language>eng ; fre ; ger</language><subject>BASIC ELECTRIC ELEMENTS ; ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS ; ELECTRICITY</subject><creationdate>2024</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=20241204&amp;DB=EPODOC&amp;CC=EP&amp;NR=4471827A2$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,778,883,25547,76298</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=20241204&amp;DB=EPODOC&amp;CC=EP&amp;NR=4471827A2$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>LANGRIDGE, David J</creatorcontrib><creatorcontrib>GREEN, Martin Raymond</creatorcontrib><title>MASS FILTER HAVING REDUCED CONTAMINATION</title><description>A method of mass filtering ions is disclosed comprising: providing a first, AC-only, mass filter 2; 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subjects BASIC ELECTRIC ELEMENTS
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
ELECTRICITY
title MASS FILTER HAVING REDUCED CONTAMINATION
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