Liquid chromatograph mass spectrometer
AssigneeShimadzu Corporation
InventorYoshitake Yamamoto
Life of this patent
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Abstract
In a liquid chromatograph mass spectrometer, chromatogram data is obtained by carrying out alternately a mass scanning in a positive ion detection mode and a mass scanning in a negative ion detection mode, obtaining the chromatogram data in every positive and negative polarities through summing up the mass spectrum data obtained at the respective mass scannings, and adding the data of both polarities. Since the chromatograms in both polarities are averaged, even if there is a level difference therebetween, a chromatogram in a normal form can be obtained.
Claims6
A chromatograph mass spectrometer for sequentially processing a sample, comprising:
- a setting device for setting beforehand a plurality of spectrometry conditions when a mass spectrometry is carried out,
- a spectrometry execution device electrically connected to the setting device for executing a cycle of spectrometries by changing one of the spectrometry conditions set by the setting device whenever one mass scanning in said cycle is carried out, said spectrometry execution device sequentially executing the one cycle spectrometries repeatedly, and
- an operation device electrically connected to the spectrometry execution device for obtaining chromatogram data by respectively adding together a number of mass spectrum data obtained by the one mass scanning in one cycle when one cycle of the mass spectrometry is completed.
Dependencies are inferred from the claim text.