Improvements in or relating to SIFT-MS instruments

摘要

A method of improving the signal intensity of the precursor ions constrained in a carrier gas in the flow tube of a SIFT-MS instrument comprises the application of an electrical potential to the flow tube to lower the diffusive loss of ions within the flow tube. Also disclosed is a SIFT-MS (selected ion flow ass spectrometry) instrument having a flow tube and including a means to provide an electrical potential to the flow tube to lower the diffusive loos of ions within the flow tube.