View source for File:3 11 2 CobaltYellowCastelfranco EDS Spectrum.jpg

EDS Spectrum showing elemental peak height as a function of X-ray counts collected (LC) 

Elements Identified
Major (> 10%): oxygen, carbon, zinc, chromium.
Minor (1-10%): sulfur, calcium, potassium, sodium.
Trace (< 1%): barium.

Area X-ray counts collected: 1,018,941.
Live Time: 19.8 seconds.
Magnification: 1725x.
Analyzed using Oxford X-Max80 energy-dispersive X-Ray spectroscopy (EDS) and Oxford AZtec platform software. Pigment sample was applied to carbon tape and mounted onto aluminum examination stub. X-rays from sample were excited by a 20 kV SEM electron beam in a low vacuum chamber (10 Pascals). The resolution of the X-Max80 silicon drift detector is 123 eV at MnKα wavelength.