bpjackso might be able to do basic peak identification, baseline subtraction and peak integration quicker than just pulling the data into excel and doing it manually?
OMG yes, it will be so much easier to do this in iolite than Excel! 😃
To select baselines, I would go to Tools -> Automatic Selections -> From Channels; add a criterion by clicking the + button in the top left, and then I would try using TotalBeam as the channel, and the comparitor to 'LessThan' and choose some appropriate value (e.g. 10,000 CPS? You can zoom in on your baseline intervals to see what sort of counts you're getting and set a value just above that). This basic process is described in the U-Pb tutorial here (you can ignore everything after selecting the baselines as it's not relevant here).
Then for the peaks, the trouble you might have is differentiating between reference materials and samples. If you're analyzing teeth, I would try creating a criterion based on Ca43 being above a certain value, using the 'GreaterThan' comparator. You have two ways you could do it here: select all ablations and move each of the reference materials ablations to their own group (in the Selections Browser). Or you could find some element (or ratio of elements) that is unique to the reference materials. Then use that as a criterion in the automatic selections as described above.
If you need to use the ratio between two channels, you can run the Trace Elements DRS without having selected your Ref Mats. The DRS will go as far as it can, which will include subtracting the baselines, and ratioing channels. You can then use these ratio channels in the Automatic Selections tool as described above.
If you have any troubles, please just let us know