You can estimate the amount of doping via four methods. 1. Go for EDS mapping 2. ICPMS 3. XRF 4. Rietveld refinement of X-ray data. Through occupancies yiou can get your values in at%. However, in refinement intially you have to chose the theoretical value of doping concentrations. After refinement you will get the values. EDS-mapping sometimes gives lesser concentration and so don't believe on EDS results too much. Better will be go for ICPMS and Rietveld refinement.
You can have a look at my papers. I have calculated through Refinement of X-ray data.