The Application Of XRF Fluorescence

 XRF Testing

 

X-ray fluorescence analysis is particularly well suited for studies where

• Bulk chemical analysis of the important elements (Si, Ti, Al, Fe, Mn, Mg, Ca, Na, K, P) in rocks and sediments
• Bulk chemical analysis of trace elements (for frequencies> 1 ppm, Ba, Ce, Co, Cr, Cu, Ga, La, Nb, Ni, Rb, Sc, Sr, Rh, U, V, Y, Zr, Zn) in rock and sediment - detection limits for trace elements are usually in the order of a few parts per million

X-ray fluorescence analysis is a limited

• relatively large samples, typically> 1 gram
• materials in powder form and can be effectively prepared homogenized
• Materials for compositionally similar, is well-characterized standards are available
• Materials with high abundances of the elements for the absorption and fluorescence effects are understood fairly well

In most cases, ground rocks, minerals, sediments and minerals, the sample to a fine powder. At this point, can be analyzed directly, especially in the case of trace analysis. But the wide spectrum in the frequency of the various elements, especially iron, and the wide range of sizes of grains in a powder sample, the proportionality in relation to the standards very difficult. For this reason, it is common to a mixture of powdered sample with a chemical flow and use a gas stove or oven to melt the powder sample. Creates a homogeneous melting glass that can be analyzed and the frequencies of the (now somewhat watered calculated) elements.

XRF Testing