When conducting XRF (X-ray Fluorescence) analysis, the size of the sample is crucial for accurate results.
5 Key Points to Consider
1. Standard Sample Size
The sample size for XRF analysis typically requires a surface area of either 32 mm or 40 mm in diameter.
2. Sample Preparation for Solid Samples
For solid samples, the preparation process involves grinding the sample to achieve a homogeneous mixture.
The optimal grain size for XRF analysis is less than 75 µm.
This fine grain size ensures that the sample is evenly distributed and that there are no voids between the grains.
The sample should form a flat, even surface, which is crucial for accurate analysis.
3. Sample Preparation for Liquid Samples
Unlike solid samples, liquid samples do not require grinding.
The XRF method can directly measure liquid samples without converting them into a solid form.
This direct measurement is possible because XRF is not sensitive to the state of aggregation.
4. Choosing the Right Sample Preparation Method
The choice of sample preparation method depends on the type of material being analyzed and the specific requirements of the analysis.
For instance, a food sample may only require 2-4 tons of pressure during preparation, while a mineral ore may need up to 40 tons.
In cases where better homogenization is required, fused beads are used.
This technique involves mixing the ground sample with a flux and heating it to high temperatures, although it may dilute trace elements and affect their detection.
5. Equipment and Sample Size
The equipment used for XRF analysis, such as XRF dies, typically accommodates samples of 32 mm or 40 mm in diameter.
These standard sizes are accepted by most XRF spectrometers.
For laboratories requiring higher sample throughput, automated systems like the APEX 400 press are available, which automate the pellet ejection step, enhancing efficiency and allowing operators to focus on other tasks.
Continue exploring, consult our experts
Ready to elevate your laboratory’s capabilities? Explore the precision of XRF analysis with KINTEK SOLUTION’s industry-leading equipment. Whether you’re preparing solid or liquid samples, our comprehensive range of products and solutions ensure accurate and representative results. From our finely tuned XRF dies to automated systems that optimize sample throughput, KINTEK SOLUTION is your go-to partner for all your XRF analysis needs. Contact us today to learn more about how we can help you achieve unparalleled analytical precision.
