Converting time intervals to distance

SilviaCastilla

Hi, I am conducting line scans in zoned crystals from core to rim and already have EPMA data. I want to match the line scan data to my EPMA data by creating concentration vs. distance profiles using the time series option. However, the time series is based on elapsed times, which don’t necessarily align with specific spots of interest. I’d like to know if it’s possible to split the signal from each line scan into multiple time segments that correlate with my EPMA spots. For instance, if I measured 20 points along a crystal with the microprobe, I’d like to segment the line scan into 20 sections. Also, In doing this, how can I account for signal smearing? Thank you!

Bence

Hi @SilviaCastilla

I've just added a first draft of a new tool for subsetting selectioins, available on GitHub:

https://github.com/iolite-LA-ICP-MS/iolite4-python-examples/tree/master/ui

It's the SelectionSubsetter.py script. There is a Note explaining how to download it here: https://notes.iolite.xyz/posts/downloadingfromgithub/

If you put that script in your Plugins/User interface folder you can use that to automatically break your selections into, for example, 20 sub-selections. iolite will then report a mean/median, uncertainty etc for each of the sub-selections. You can work out the distance along your profile by multiplying the median time for each sub-selection by the ablation scan rate.

Regarding correcting for signal smear, it is possible but getting the settings wrong can easily lead to incorrect results. To do this properly, we'd need to know more about your analytical setup etc. Please let us know what you have in mind.

Kind regards,
Bence