Why you use p 10 gas in xrf?

Answer 1

Gas flow is used mainly for detection of longer wavelengths. Gas flows through continuously. The gas is usually 90% argon, 10% methane ("P10"), although the argon may be replaced with neon or helium where very long wavelengths (over 5 nm) are to be detected. The argon is ionised by incoming X-ray photons, and the electric field multiplies this charge into a measurable pulse. The methane suppresses the formation of fluorescent photons caused by recombination of the argon ions with stray electrons.

Answer 2

P10 gas (90% argon and 10% methane) is commonly used in XRF instruments to generate a plasma that facilitates excitation of the sample for analysis. The methane helps stabilize the plasma, resulting in a more consistent and efficient analysis process. Additionally, the argon provides an inert atmosphere to minimize interference from atmospheric gases during the analysis.