Jeol JXA-8230 Electron Probe Micro-Analyzer (EPMA)

Model: 
JXA-8230 Electron Probe Micro-Analyzer (EPMA)
Make: 

Electron Microprobes have been widely used for over 40 years for non-destructive, quantitative, elemental microanalysis of solid materials. They are the instrument of choice for quantitative elemental analyses of solid particles including major, minor and trace elements.

The electron beam, produced by an incandescent LaB6 or W filament hit the specimen in the desired point of interest, selected on optical, backscatter or secondary electron images. Interacting with the sample, the primary electron beam produces characteristic secondary X-ray spectra for each element species present in the analysed point. These characteristic X-rays are then filtered with high sensitivity diffracting crystals and sent to a detector where they are counted and then compared to a standard. The result will be a quantitative analysis of the elements present in a small volume of material and with high spatial resolution of analysed points. In addition, microprobes can produce quantitative element maps of larger areas showing variations in elements distributions on the investigated surface.

All elements from F to U can be routinely analysed. Elements presents in major and minor quantities can be determined using standard diffracting crystals. Trace element and light element (B-O) analysis requires special high-sensitivity or light element spectrometer crystals, which also are part of the system.

The electron microprobe is equipped with four wavelength dispersive spectrometers (WDS) for simultaneous determination of four different major, minor or trace elements. In addition, a cathode-luminescence (CL) detector allows the investigation of zircon textures for the selection of crystals for U-Pb isotope age dating.

Condition: 
New
Category: 
Other
Disciplines: 
Chemistry, Environmental Sciences, Geosciences, Life Sciences, Material Sciences
Life Expectancy: 
20years
Location
Department: 
Geology
Rhodes University
Drosty Road
Grahamstown
6139

Contact Person/s

Name: Dr Gelu Costin
Phone: +27 46-603-8316
Email: g.costin@ru.ac.za
Estimated Cost and Availability
Internal: 
R100
Per Hour
External: 
R120
Per Hour
Private Sector: 
R500
Per Hour
Time Spent Researching: 
65
Time Spent Teaching: 
3
Time Spent Other: 
2

Grantholder

Title: Prof
First Name: JS
Last Name: Marsh
Phone: +27 46-603-8312
Email: goonie.marsh@ru.ac.za
Funding Information
Equipment Price: 
R7,799,000
Year of Acquisition: 
2011