Abstract: There is provided a mass spectrometry apparatus comprising: an ion source arranged in a substantially horizontal orientation and from which a quantity of ions may be sourced, an ion filter device arranged for receiving a stream of ions for filtering thereof; and, an ion guide arranged so as to guide ions sourced from the ion source toward the ion filter device. The ion source and the ion filter device are arranged relative to one another so that the profile of the apparatus is reduced so as to minimise the effective footprint of the apparatus.

Abstract: There is provided a sampling interface for use with a mass spectrometry apparatus. The sampling interface is arranged so as to enable the sampling of ions in a mass spectrometer. In one aspect, the sampling interface comprises an inlet for receiving a quantity of ions from an ion source, and a region downstream of the inlet for accommodating a gas through which the ions may pass, wherein a field having a selected bias voltage potential is provided in at least a portion of the downstream region through which the ions may pass.