The data should have multiple runs at various energies. In terms of positive, there was only 1 at each energy.

I think there was 8 runs for the powder (6 negative, 2 positive) and 6 for the foil, (4 negative, 2 positive)

Let me know if you see different.

The foil was just stuck down bare.

The powder in Acetonitril (see photo above)

The foil and powder was also tested with SEM/EDX (data above)

We hope to run ICPMS on it also.