pXRF standards for pigment anaylasis?

[Kate Lawrence]

Hi Friends!

I am a PhD student at Flinders university in Australia. As part of my project, I am using pXRF to identify pigment residues on a corpus of Medieval stone sculpture.

I was wondering if there are any reference standards available (commercially or through an institution) for pigments that I can use both as reference materials in the lab whilst performing analysis, and to create a custom calibration for the university's device(s)?

Thanks Friends!