last update 8/27/16....

What is EMPA? or is it EPMA?

If you never have done EPMA before and plan to bring your samples to our lab, you MUST make sure you have a MIRROR-LIKE POLISH on them. This is minimally a 1 micron polish, and preferably sub-micron. This is known as a "probe polish" and must be applied for proper, correct microprobe analysis (see red paragraph below). I have had too many new probe users from other institutions show up with samples that have a "standard petrographic polish" of 18 microns. This is not a polish for a microprobe. If you are not sure, please contact us first, rather than show up and we have to spend hours trying to improve the polish in a less than optimal setup.

Back to the UW- Madison Probe Lab Home Page