Comparison of wavelength dispersive X-ray fluorescence and energy dispersive X-ray fluorescence techniques

The wavelength-dispersive fluorescence technique (Primini red lines below) has superior resolution and sensitivity, when compared to the alternative energy-dispersive fluorescence method ("EDX" blue lines below). For example, figure below displays the resolving power of the wavelength technique in the area of the titanium (Ti-KA) and barium (Ba-LA) overlap with two distinct peaks, distinguishing it from the amorphous scatter seen in the energy peak at the same region.

wavelength-dispersive fluorescence technique

The increased sensitivity in determining trace level elemental content from the background noise with the wavelength technique is further exemplified in the figure below, where fluorine (F-KA), iron (Fe-LA), and sodium (Na-KA) peaks are all detected in the wavelength scan, but entirely lost to the background in the energy scan.
 increased sensitivity in determining trace level elemental content from the background noise



priminiRigaku's Primini Biofuel is suitable for phosphorus analysis in biodiesel for EN14214 and ASTM D6751. It is optimized for sub-ppm detection limits of P, S and Cl and features easy operation without chemical treatment of the samples. Easy sample preparation and operation reduces the need for a highly skilled operator. A helium atmosphere is maintained in the spectroscopic chamber and sealing film separates the sample chamber from the spectroscopic chamber, protecting the X-ray tube and the spectrometer in the event of a spilled oil sample. Read more about Primini Biofuel...

Ask for more info