Abstract: A method of mass spectrometry is disclosed comprising digitising a signal output from a detector to provide a first digitised signal. A finite impulse response (“FIR”) filter, a digital filter or an echo cancellation filter is applied to the first digitised signal in order to reduce the effect of baseline perturbations, echoes or ringing effects. Alternatively, an analogue signal output from a detector is passed to one or more first power splitters or dividers, wherein one or more first transmission lines are attached to one or more ports of one more said first power splitters or dividers in order to reduce the effect of baseline perturbations, echoes or ringing effects.

Abstract: A method of mass spectrometry is disclosed comprising digitising a signal output from a detector to provide a first digitised signal. A finite impulse response (“FIR”) filter, a digital filter or an echo cancellation filter is applied to the first digitised signal in order to reduce the effect of baseline perturbations, echoes or ringing effects. Alternatively, an analogue signal output from a detector is passed to one or more first power splitters or dividers, wherein one or more first transmission lines are attached to one or more ports of one more said first power splitters or dividers in order to reduce the effect of baseline perturbations, echoes or ringing effects.

Abstract: A method of mass spectrometry is disclosed comprising digitizing a signal output from a detector to provide a first digitized signal. A finite impulse response (“FIR”) filter, a digital filter or an echo cancellation filter is applied to the first digitized signal in order to reduce the effect of baseline perturbations, echoes or ringing effects. Alternatively, an analog signal output from a detector is passed to one or more first power splitters or dividers, wherein one or more first transmission lines are attached to one or more ports of one more said first power splitters or dividers in order to reduce the effect of baseline perturbations, echoes or ringing effects.

Abstract: A method of generating spectral data comprising the steps of deriving a temporally separated sample from a temporal separation device and subjecting the temporally separated sample to an analysis involving scanning at least one spectrally significant parameter, wherein the analysis is performed so that at least two scans in succession are in opposite directions.

Abstract: A method of generating spectral data comprising the steps of deriving a temporally separated sample from a temporal separation device and subjecting the temporally separated sample to an analysis involving scanning at least one spectrally significant parameter, wherein the analysis is performed so that at least two scans in succession are in opposite directions

Abstract: A method of mass spectrometry is disclosed wherein ions are trapped for a period of time T within an AC or RF ion guide maintained at a pressure P wherein the product P×T is at least 1 mbar-ms. The effect of trapping the ions according to a preferred embodiment is that singly charged ions which may, for example, comprise unwanted background ions are substantially lost from the trap whereas multiply charged analyte ions are maintained within the ion trap and can then be released for subsequent mass analysis.