Trapping ring electrode cell: a FTICR mass spectrometer cell for improved signal-to-noise and resolving power.

ABSTRACT: A novel FTICR cell called the trapping ring electrode cell (TREC) has been conceived, simulated, developed, and tested. The performance of the TREC is compared to a closed cylindrical cell at different excited cyclotron radii. The TREC permits the ability to maintain coherent ion motion at larger initial excited cyclotron radii by decreasing the change in radial electric field with respect to z-axis position in the cell. This is accomplished through postexcitation modulation of the trapping potentials applied to segmented trap plates. Resolving power approaching the theoretical limit was achieved using the novel TREC technology; over 420,000 resolving power was observed on melittin [M + 4H] (4+) species when employed under modest magnetic field strength (3T) and a data acquisition duration

SUBMITTER: Weisbrod CR 

PROVIDER: S-EPMC2915943 | biostudies-literature | 2008 Sep

REPOSITORIES: biostudies-literature