H - Electricity – 01 – J
Patent
H - Electricity
01
J
358/9
H01J 49/42 (2006.01)
Patent
CA 1270342
Abstract of the Disclosure A method is disclosed for ins ineasing the dynamic range and sensitivity of a quadrupole ion trap mass spectrometer operating in the chemical ionization mode. Prior to mass analysis, a prescan is performed with the ion trap and the ionization and reaction periods are adjusted to produce enough stored product or analyte ions to generate a good signal-to-noise ratio in the detection of trace amounts of analyte, yet not so many analyte ions that resolution in the mass spectrum is lost. A mass analysis scan is then performed with the ion trap using the ionization and reaction periods pre-determined during the prescan.
567418
Bradshaw Stephen C.
Syka John E. P.
Weber-Grabau Michael
Finnigan Corporation
Smart & Biggar
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