Abstract: Disclosed herein is a three dimensional quadrupole ion trap for analyzing samples. The ion trap includes a pair of opposing end cap electrodes which define a cavity and an axis between them. The ion trap includes a ring electrode attached between the end cap electrodes and circumscribing the axis. Each of the end cap electrodes and ring electrodes are made from Molybdenum to minimize chemical reactivity and to resist thermal deformation.

Abstract: Disclosed herein is a three dimensional quadrupole ion trap for analyzing samples. The ion trap includes two spaced apart end cap electrodes being generally opposed to one another and defining a first axis between them. The ion trap includes a ring electrode between the end cap electrodes and adjacent thereto. Each of the end caps and ring electrodes are made from Molybdenum. The ion trap having a cavity defined by the end caps and ring electrodes. The ion trap including a sample injector for injecting the sample into the cavity, an rf source for filtering the ions of the sample and a DC source for selectively accelerating the filtered ions into an analyzer a cavity.