Your link is buggered - it should be http://michaelandpaula.com/mp/AzoFor...ID=10524&CID=5
The table is buggered too, but at least it's possible to read if you know what you're looking for.
What's worse is that it doesn't make sense at all! There is absolutely no way that 98% Amidol can contain 39.18% Magnesium and 11.24% Calcium by weight.
Which means that what is presented is the percentages of those elements which have been analysed, with no way of finding out what fraction this is of the whole. For all the analysis tells us, the Chinese amidol could actually be far purer than the reference! And what kind of spectra have been compared? Light? UV? IR? Xray? Emission or absorption?