Sr Isotopes DRS with CaAr and REE corrections

Bence

Hi all,

We have just released a beta version of a combined Sr isotopes DRS. This DRS was based on two older DRS for iolite v3: one for CaAr correction and that included REE corrections. Someone in the iolite community combined the two DRS and posted it to the old iolite forum. Unfortunately that forum is now dead, so determining who combined the two is a little hard now (please raise your hand if it was you 😄 ).

Recently, Matt Horstwood from the British Geological Survey and I have been working on a version for iolite v4. You can find that new version here.

Although this is an update on an existing DRS, we recommend that it be cross-validated by the community. For example, the order of corrections applied may depend on the material you're analysing, and the masses used may need to be adjusted for your instrument.

Please feel free to provide feedback here in this thread if you have any suggestions, comments or questions about the new DRS.

Bence

kortega

Hi Bence,
I'm trying to process some data using this CaAr DRS, but unfortunately we didn't collect mass 83.5 during that run. Pretending (hoping) the interference is negligible in our sample (something we'll try to double check, but that's a separate problem we'll deal with), is it possible to tell the program to set mass 83.5 to 0 during the calculation? I assumed I could simply tweak the DRS file to set 83.5 = 0 somewhere in the code and re-install that as a new DRS, but I'm not super experienced at coding and I wanted to check if that would even work for the way this calculation is set up.
Thank you in advance for any help!

Bence

Hi kortega,

As a quick fix you could create a m83.5 channel using the channel calculator. This could then be set to 0 so that you can use the DRS. The channel calculator is in Tools -> Calculator.

I would set it up like this:

where m88 is the name of one of your other input channels.

At that point you should be able to see your new channel in the Channels Browser, but the DRS won't be able to find the channel until you set its Mass property. You can do that with this one line:

data.timeSeries("m83.5").setProperty("Mass", 83.5)

If you copy and paste that line into iolite's python console (Tools -> Python Console). You should have a m83.5 channel that is filled with 0, and has a Mass property of 83.5.

Obviously, this is just a stop gap measure for testing 😃

If that doesn't work, please just let me know.

-Bence

kortega

Bence Thank you!! The only change I had to make was to use "Sr" instead of "m" (i.e. Sr83.5 rather than m83.5, etc.) otherwise it wouldn't calculate.