Methods and apparatus for producing a mass spectrum

摘要

The invention provides a method of producing a mass spectrum, comprising:
obtaining a transient from the oscillation of ions in a mass analyser;Fourier transforming the transient to obtain a complex spectrum having a real component and an imaginary component; andcalculating an enhanced spectrum which comprises a combination of (i) and (ii) wherein(i) comprises a Positive spectrum; and(ii) comprises an Absorption spectrum.;Also provided are an apparatus for producing a mass spectrum suitable for carrying out the method as well as a method of determining a phase correction for a complex spectrum obtained by Fourier transformation from a detected transient obtained from a mass analyser.

主权项

1. A method of producing a mass spectrum, comprising:
causing ions to undergo oscillations within a mass analyser; obtaining a transient representative of the oscillation of ions; using a suitably programmed information processor, Fourier transforming the transient to obtain a complex spectrum; and using the suitably programmed information processor, calculating an enhanced spectrum having a resolution higher than that of a Magnitude spectrum calculated from the complex spectrum, which comprises a combination of spectrum (i) and spectrum (ii) wherein spectrum (i) comprises a Positive spectrum obtained from the complex spectrum; and spectrum (ii) comprises an Absorption spectrum obtained from the complex spectrum.