I’ve recently created a DRS for Pb-Pb isotope ratios for CPS data, modified from the ‘Laser_Pb_Faraday’ DRS. It’s fairly straightforward: correcting for Hg interference on 204Pb; calculating isotope ratios from the cps data; applying a mask to cut low noisy signals; and correcting to a reference material. That all works well.
However for some analyses in the Output there are large spikes in the final ratios (caused by abnormally high CPS for 1 isotope, rather than regular signal noise).
The only smoothing code I have found in other DRS relate to smoothing the standard data for calculating down hole ratiocination curves (which isn’t applicable to this Pb-Pb ratio data).
Smooth/M=(abs(FitOutlierTolerance*(ThisWave[p]+ThisWave[p+1]+ThisWave[p-1])/3))/R=(NaN) 9, ThisWave //aiming at only removing spikes. set here at 1.5 times the average value for this portion of the wave (9 point range centered on this point)
I haven’t had any success at modifying this to apply to the Output ratios…
Is there a way to smooth these spikes or apply an outlier rejection for the final Output ratios?
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