Mass calibration law

The evolution of a calibration law for the cubic cell has seen a number of proposals for the frequency-to-mass relationship (26.37-40). Recently, Ledford, et al. (40) developed an algebraically correct mass calibration law (Equation 2), which is now commonly used. Unlike sector mass spectrometry in which many... [Pg.45]

The mass calibration law gives mass measurement accuracy of ca. 2 ppm and a precision of ca. 1 ppm. Errors are still systematic, but the measurements are much less sensitive to space charge effects than those made with the cubic cell. One possible cause of the systematic errors may be magnetic field inhomogeneity caused by... [Pg.48]

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