Patent ID: 6593569
Filing Date: 2003-07-15
Classification: G01N,H01J

Abstract:
A collisional gas delivery apparatus for delivering collisional gas to a mass spectrometer whereby no gas flow meter is being used comprising:a first capillary tube of a first internal diameter and length adapted to have one end connected to a source of damping gas, a second capillary tube having a diameter and length such as to present a substantially lower restriction to flow than the first capillary tube has one end connected to the other end of the first capillary tube, and its other end vented to the atmosphere whereby collisional gas can continuously flow from the source of damping gas to the atmosphere, a third capillary tube having a predetermined internal diameter and length has one end connected to the common ends of the first and second capillary tubes, and its other end adapted to be connected to the mass spectrometer.