The ion microprobe offers great advantages over previous methods to glean natural tracer information out of rocks.
This information is lost in traditional processing, but retained with ion microprobe analysis because the rock is not broken up.
Its impedance discontinuity, less than 5 [ohm], compares to a microprobe
Electron microprobe analyses reveal that the two distinctly different colors of rhodochrosite have distinctly different compositions.
These fluid inclusion results in combination with the electron microprobe results provide answers to the question of what causes the difference between the two colors of rhodochrosite.
1992, 1995) used a proton microprobe to evaluate otolith age estimates of two fish species by comparing patterns of checks, cycles in increment width, and cycles in strontium and calcium composition.
The proton microprobe system is able to measure elements at levels approaching a few parts per million, with the further advantage of a data acquisition system that permits quantitative mapping with full-spectrum processing at every pixel in the image.
It was clear that after the successes of both our 5mm CryoProbes and our conventional microprobes a combination of the two technologies was the next logical step to further lower the detection limits of NMR for the characterization of many samples that were considered not measurable by NMR".
7 mm microprobe and about a 10-14-fold gain over a conventional 5 mm probe are obtained.
A new x-ray microprobe
(XMP) developed at Bell Laboratories, Murray Hill, N.
The metal concentrations typically found in bivalve shells are considerably less than those measurable by EPMA and are near the 20 ppm detection limit of PIXE microprobes.
Synchrotron x-ray fluorescence (SXRF) microprobes provide lower minimum detectable levels than PIXE and EPMA microprobes.