SAMPLE PREPARATION DECISION TREE
[Your sample is: a polished thin-section on a glass slide or thick-section.]
There are two different approaches to follow depending on whether your sample is already a thin-section or if the thin-section is yet to be made. We'll get to those at the bottom of the page, but first here are some details of the sample holder so you have some context for the required geometry.
You will be cutting your glass thin-section into a 1-inch-diameter round in order to fit within the sample holder shown in schematic form below. Of course, instead of an "epoxy mount" in the lower frame, you will have a round cut-out from your glass slide. Note that your final thin-section round will include mineral standards -- how you mount them will depend on whether you've already made the thin-section.
Take note of the dashed blue line in the map view above (top panel). This line illustrates the portion of the epoxy mount within the "sweet spot" for analysis, which has a 5 mm radius in the classic sample holder shown above (Kita et al., 2009) and an 8 mm radius is possible with care using the updated design (Peres et al., 2013). All sample and standard analyses must be within an 8 mm radius of the center of the round thin-section.