Patent ID: 6627883
Filing Date: 2003-09-30
Classification: H01J

Abstract:
An apparatus for a tandem mass spectrometer, said apparatus comprising:an ion source for generating ions from a sample; first and second ion traps; an analytical multipole positioned between and coaxial with said first and second ion traps; and a mass analyzer; wherein said analytical multipole is connected to a switchable power source, said switchable power source applying electric potentials to said analytical multipole and at predetermined times to generate electric fields thereon for trapping, transmitting or analyzing said ions; and wherein said ions are introduced into said first ion trap from said ion source, said ions being trapped in said first ion trap for a first predetermined time, after which time said ions are transmitted into said analytical multipole to be mass selected for transmission into said second ion trap, said ions being trapped in said second ion trap for a second predetermined time, after which time said ions are transmitted into said mass analyzer.