Condition setting rules for XRF element excitation in X-ray fluorescence spectrometer

The rules of X-ray fluorescence are simple. To see an element, you must excite an energy at least 2 keV greater than that element. This is why the voltage or energy range of the analysis is crucial. If 15 keV is chosen, it will be optimized for elements that are lighter than iron, especially calcium, potassium, titanium, etc. If 40 keV is chosen, you will see everything from barium and uranium to aluminum. However, you won’t be optimizing for any of these elements – this is a cookie-cutter masterpiece, proficient in any method. In order to get the best sensitivity for different materials, you must be able to control five key parameters:

Condition setting rules for XRF element excitation in X-ray fluorescence spectrometer

Tube pressure: allows you to select the elements you see in the spectrum

Tube flow: allows you to dim the light when measuring metals and turn it up when looking for ppm level concentrations in oxides and organics

Filter: allows you to focus on the critical element range to identify elements below the detection limit

Analysis time: This must always be controlled, especially if you start with methods such as Bayesian deconvolution

Atmosphere: Dry air contains nitrogen, oxygen and gas. This interferes with the measurement of light elements such as magnesium and sodium. You can introduce a vacuum through a tracer or pass helium gas through to view these light elements