Mass calibration apparatus

摘要

A mass calibration apparatus for a mass spectrometer includes a capillary (125), an analyte ion source (110) coupled to the capillary (125) at a first point, a reference mass ion source coupled to the capillary at a second point, downstream from the first point, and a mass analyzer (130) coupled to the capillary at a third point downstream from the first and second points. The reference mass ion source may be coupled to the capillary (125) via a tee junction (124). The reference mass ion source (150) includes a chamber (150), an ionization device (155) situated within the chamber and one or more reference mass sources (152, 154) that are situated internally within the chamber or are situated external to and coupled to the chamber (150).