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Computer-Controlled Peak-Top Search Procedure

  • D. S. Simons
  • B. F. Schunicht
  • J. A. McHugh
Conference paper
Part of the Springer Series in Chemical Physics book series (CHEMICAL, volume 9)

Abstract

Computerized acquisition of mass spectral data in the pulse-counting mode requires that the mass position be represented by a voltage that can be controlled by the computer. In a magnetic instrument operating at a fixed accelerating voltage, this is most easily accomplished by using a Hall probe to sense the magnetic field. A calibration function can then be established between analyzed mass and Hall voltage. However, this function may change slightly with time as a result of thermal effects or magnetic hysteresis. It is therefore advantageous to have an automatic procedure controlled by the computer that efficiently seeks the top of a mass peak from a starting point determined by the calibration function. A three-stage procedure has been developed for use on an ARL IMMA, and will be explained in detail in this paper.

Copyright information

© Springer-Verlag New York 1979

Authors and Affiliations

  • D. S. Simons
    • 1
  • B. F. Schunicht
    • 1
  • J. A. McHugh
    • 1
  1. 1.General Electric CompanyKnolls Atomic Power LaboratorySchenectadyUSA

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