Does anyone know how to read this XRF graph?

[Goldman94]

So I had a small sample of my refined gold to get tested by a fancy XRF machine and the guy sent me this graph that looks like Arabic to me. He explained to me that it was very pure, about 996 or so but I was curious to know if you guys have a better explanation of how to read it. He had a known sample that was pure 24k and said he tested that against mine, so I think that piece and mine are compared together on the graph. Here are some pictures and screenshots of what he said.