Patent ID: 8841605
Filing Date: 2014-09-23
Classification: H01J

Abstract:
1. A method of improving the detection limits of a mass spectrometer comprising: (a) generating sample ions from an ion source; (b) storing the sample ions in a first ion storage device; (c) ejecting the stored ions into an ion selection device; (d) selecting and ejecting ions of a chosen mass to charge ratio out of the ion selection device; (e) storing the ions ejected from the ion selection device in a second ion storage device without passing them back through the ion selection device and without fragmenting the ions; (f) repeating the preceding steps (a) to (e) so as to augment the ions of the said chosen mass to charge ratio stored in the second ion storage device; and (g) transferring the augmented ions of the said chosen mass to charge ratio back to the first ion storage device for subsequent analysis.