US 7,582,867 B2Granted

Mass spectrometers

AssigneeGriffin Analytical Technologies, L.L.C.

InventorsJames Mitchell Wells, Garth E. Patterson

Life of this patent

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Abstract

In one implementation, processes for designing mass separators from a series of mass separator electric field data and processes for designing an ion trap from a range of data pairs and a mass analyzer scale are provided. Methods for producing mass separators including ion traps having Z0/r0 ratios from about 0.84 to about 1.2 are also provided. Mass spectrometers are also provided that can include mass separators in tandem with one being an ion trap having a Z0/r0 ratio between 0.84 and 1.2. The present invention also provides methods for analyzing samples using mass separators having first and second sets of components defining a volume with a ratio of a distance from the center of the volume to a surface of the first component to a distance from the center of the volume to a surface of the second component being between 0.84 and 1.2.

Claims11

Dependent claims

A mass spectrometer comprising:

a sample inlet;
a mass separator configured to receive at least a portion of a sample from the sample inlet, the mass separator comprising first and second sets of electrode components, individual ones of the components comprising a surface, wherein, in a cross section of the mass separator, the surfaces of the first set of components oppose each other, the surfaces of the second set of components oppose each other, wherein the opposing surfaces of the first and second sets of components define a volume comprising a first distance corresponding to a half a distance intermediate opposing surfaces of the first set of components and a second distance corresponding to a half a distance intermediate opposing surfaces of the second set of components, wherein a ratio of the first distance to the second distance comprises from about 0.84 to about 1.2, and an electrode spacing distance between the first components, the electrode spacing distance being less than the product of a spacer maximum factor times the second distance;
and
a detector configured to receive and detect ions from the mass separator.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 11/906,661Filed 3 Oct 2007 · division
Priority: 2 Dec 2002
Published: US 2008/0128605 A15 Jun 2008
Granted: 1 Sep 2009
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

H01J 49/424
Device types: three-dimensional ion traps, i.e. comprising end-cap and ring electrodes
H01J 49/4255
Device types: with particular constructional features
H01J
Electric discharge tubes or discharge lamps

Family

Application60/430,223Us provisional application · filed 2 Dec 2002
PCT/US03/38587Parent of this division · filed 2 Dec 2003
US 2008/0128605 A1Pre-grant publication · published 5 Jun 2008
Application10/537,019Parent of this division
US 7,294,832 B2Parent of this division
US 2006/0163468 A1Published application
US 7,582,867 B2This patent

From the US filing history. Foreign family members aren’t listed.