EDX-8100 - Applications

Energy Dispersive X-ray Fluorescence Spectrometer

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Comprehensive Applications

Powders (Fine/Coarse Particles) −Qualification and Quantitation of Cement−

The analysis of powder samples is a typical X-ray fluorescence spectrometry application. The samples can be press-formed or loose in the sample cell.
The following shows an example of the analysis of a cement standard substance using Na–U qualitative/quantitative analysis, which is the standard method for powder analysis. Accurate quantitation was achieved without using standard samples. Performing measurements in a vacuum achieved sensitive measurements of light elements.

Precious Stones −Dif ferentiation of Natural Stones /Synthetic Stones−

Various instruments are used in appraisals of precious stones, including not only general gemstone appraisal tools such as the stereoscopic microscope, but also various analytical instruments.
The energy dispersive X-ray fluorescence spectroscope (EDXRF) is also a necessary and indispensable instrument that enables quick, nondestructive composition analysis.
A Shimadzu EDX-8100 was used in a composition analysis of rubies which are
commonly seen gemstones and strongly loved by many people, and effective results for distinguishing natural stones and synthetic stones and identifying the geographic origin of natural stones were obtained.

 
Precious Stones
 

The Zambian stone has high contents of chromium and iron and a low content of vanadium in comparison with the Colombian stone.
Comparatively large amounts of sodium, magnesium, and potassium and trace amounts of rubidium and cesium were also detected in the Zambian stone, providing one indicator for distinguishing this stone from the Colombian stone.

Foreign Matter Material Evaluation
−Foreign Matter Adhering to Plastic Extruded Part−

EDX permits non-destructive elemental testing, making it effective for the analysis of foreign matter adhering to or mixed in with foods, drugs, or products. Using the sample observation camera and collimators makes it easy to identify trace foreign matter.
The 1 mm irradiation diameter is effective at reducing the effects of peripheral material, resulting in accurate quantitative matching. In the example, the material was identified as SUS316.

Foreign Matter Material Evaluation

Food, Biological Samples, Plants
−Mineral Composition of Algae, Small Samples−

EDX is used for the analysis of elements contained in foods and biological samples. It is effective for process control when adding elements to foods, evaluating the poor growth of crops, and identifying the region or origin.
The new background FP function achieves similar quantitation results with low sample volumes as from adequate sample volumes. It is effective in research applications when only small samples are available and in eliminating discrepancies due to differences in sample pretreatment by operators.

Sample Preparation

Solid Samples

Pretreatment of metal samples
To enhance the quantitation precision for metal samples or to eliminate the effects of contamination or oxidation on the sample surface, machine and polish the sample surface with a lathe and rotary polishing machine.

Liquid Samples

Powder Samples

Pulverizing Samples
Pulverize samples with coarse particle sizes, or samples subject to effects of non-uniformity of mineral particles on the analysis surface.

Glass Bead Method
The glass bead method provides highly accurate analysis of oxide powders, such as rock. The sample is glassified using a flux such as Li2B4O7.