Knowledge What is the XRF Analysis Procedure? 5 Key Steps Explained
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Tech Team · Kintek Solution

Updated 1 month ago

What is the XRF Analysis Procedure? 5 Key Steps Explained

X-ray Fluorescence Spectroscopy (XRF) is a non-destructive analytical technique used for elemental analysis.

The procedure involves exciting a sample with high-energy X-rays, causing the atoms in the sample to absorb the energy and subsequently release it as X-ray fluorescence radiation at specific energy levels unique to each element.

By measuring the energy and intensity of this fluorescence, the elemental composition of the sample can be determined.

XRF is widely applicable across various fields including geology, mining, environmental science, materials science, pharmaceuticals, metallurgy, and the food industry.

What is the XRF Analysis Procedure? 5 Key Steps Explained

What is the XRF Analysis Procedure? 5 Key Steps Explained

1. Excitation of the Sample

The XRF analysis begins with the excitation of the sample.

This is achieved by exposing the sample to high-energy X-rays.

The energy of these X-rays is sufficient to cause the inner shell electrons of the atoms in the sample to be ejected.

2. Emission of Fluorescence Radiation

Once an electron is ejected, the atom is in an excited state.

To return to a stable state, an electron from a higher energy level drops into the vacant lower energy level.

The energy difference between these levels is emitted as X-ray fluorescence radiation.

Each element has a unique set of energy levels, resulting in a unique pattern of emitted radiation.

3. Measurement and Analysis

The emitted fluorescence radiation is measured using an XRF spectrometer.

The energy of the radiation is analyzed to identify the elements present in the sample, as each element emits radiation at specific energy levels.

The intensity of the radiation is proportional to the concentration of the element in the sample, allowing for quantification of the elements.

4. Sample Preparation

Proper sample preparation is crucial for accurate results.

Common methods include making pressed pellets, which involves homogenizing a sample into a fine powder and pressing it into a pellet form.

This method is favored for its efficiency, cost-effectiveness, and ability to produce high-quality results.

5. Applications and Advantages

XRF is particularly valued for its non-destructive nature, allowing for the analysis of valuable samples without alteration or damage.

Portable XRF analyzers have further expanded its utility by enabling analysis in various locations and conditions, enhancing its applicability in field studies and on-site inspections.

Continue exploring, consult our experts

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