The main Iolite overview window, displaying two raw channels vs time.  In this instance one of the channels displayed (Mass 86[V] in collector H2, light grey) is loaded from a multi-collector instrument and the other (24Mg[CPS], dark red) from a single-collector instrument connected to the same laser and acquired over the same time period.  The lower panel shows a zoom view of the baseline region in which only 24Mg is evident (the baseline for Mass 86 is not apparent at this scale). User-selected baseline integrations for the selected primary channel (24Mg[CPS]) are shown as black boxes (where height is dependent on the standard error of the enclosed baseline data) and the uncertainty-weighted spline curve through them (green) is the interpolated baseline, those for all other channels being calculated in the same way).  This particular data reduction scheme has been written to produce simultaneous Sr isotope ratio and trace element concentration data from calcium carbonate samples, in this instance used to compare isotopic and elemental images of the surface of an otolith.  After 3PM in the data set only single-collector data have been recorded, in this instance to produce an elemental line profile.  Several analyses of the NIST 612 glass are included, each at about 150,000 CPS of 24Mg, and fractionation factors determined from these may be interpolated in a similar manner to the baselines.

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