Drift correction

stanroozen

Hi all,

I have a question regarding if any drift correction is applied when reference materials are set in iolite4. I select NIST610 as external reference material in the DRS and use the Trace element DRS to calculate the concentrations of my unknown samples. Is any drift correction based on the spline of the NIST610 applied to the data? When i check my secondary standards and NIST610 in the results section afterwards i can see there is still drift in these reference materials, i.e. there is a constant diffrence in all elements in the RMs that i measured in the beginning and the end of my session.

greetings Stan

Bence

Hi Stan,

The drift correction is applied in the concentration calculation (there is an explanation of this equation in the basics webinar). This calculation uses the spline value of the reference materials.

If there is still drift in your samples, it means that the spline describing the primary reference material is not accurately modelling the drift. This can happen especially if you've chosen something like a linear fit model, or some other simpler model.

If your primary RM does not have any residual drift, but your secondary RMs do, this suggests that there is some other effect decoupling your secondary RMs from your Primary RM. This latter case is pretty rare though.

If that doesn't help, please let us know.

-Bence