Page 19 - Shimadzu EDX-8100

Comprehensive Applications Sample Preparation

Foreign Matter Material Evaluationɹ−Foreign Matter Adhering to Plastic Extruded Part− Solid Samples
• Large samples (> 13 mm dia.) • Small samples (< 13 mm dia.)
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.
Fe Ka

Ti Ka Ti Kb Cr Ka Cr Ka Mn Kb Fe Kb Ni Ka Ni Kb Zn Ka Zn Kb Mo Ka Simply mount in the instrument. Cover the bottom of the cell Cover with lm. Cover the measuring
with lm and add the sample.
window with lm and place
the sample on it.
Foreign matter Pretreatment of metal samples
To enhance the quantitation precision for metal
Normal position
samples or to eliminate the effects of
Sample Appearance Overlaid Pro les of Foreign Matter (Red) and Normal Position (Blue) contamination or oxidation on the sample
surface, machine and polish the sample surface
Red circle: foreign matter Machined and polished sample Lathe
Blue circle: normal position with a lathe and rotary polishing machine.

Liquid Samples
• Measurement in atmosphere or with helium purging • Measurement in a vacuum
Quantitative Analysis Results for Foreign
Matter by FP Method
The titanium (Ti) and zinc (Zn) peripheral
material around the foreign matter are Matching Results
eliminated from the quantitation calculations. (Matching results in internal library.
Substance identi ed as SUS316.)
If a small volume of sample results in inadequate thickness
Food, Biological Samples, Plantsɹ−Mineral Composition of Algae, Small Samples− (depth), use a Micro X-Cell.
(This also applies to powder 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 Cover the bottom of the cell Perform measurements on
with lm and add the sample. sample dripped onto special
foods, evaluating the poor growth of crops, and identifying the region or origin. lter paper and dried.
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. Powder Samples
Adequate volume Low volume

Flat press heads

Image of Sample (Adequate Volume)

Difference in Fluorescent X-Ray Intensity Due to Sample Volume Cover the bottom of the cell Press form the powder with a Press machine
with film and add the sample press machine
(loose powder method). (briquette press method).
Adequate volume
Image of Sample (Low Volume) Low volume_background FP Pulverizing Samples Glass Bead Method
Low volume_conventional FP
ʲCommentsʳ Quantitation value(wt%) Pulverize samples with coarse particle sizes, The glass bead method provides highly
accurate analysis of oxide powders, such as
or samples subject to effects of
With conventional FP, the changes in
uorescent X-ray intensity due to the sample non-uniformity of mineral particles on the rock. The sample is glassified using a flux
quantity and shape lead to quantitation analysis surface. Pulverizing such as Li2B4O7.
errors. Background FP eliminates these container
effects to achieve stable quantitation values. Comparison of Quantitation Values by Background FP and Conventional FP Methods Automatic Pulverizer

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