A monochromatic X-ray beam with a wavelength suitable to excite the K-shell electrons of chlorine is focused onto a test specimen contained in a sample cell. The fluorescent Kα radiation at 0.473 nm (4.73 ?) emitted by sulfur is collected by a fixed monochromator (analyzer). The intensity (counts per second) of the chlorine X rays is measured using a suitable detector and converted to the concentration of chlorine (mg/kg) in a test specimen using a calibration equation.
ASTM D7536-16 Standard Test Method for Chlorine in Aromatics by Monochromatic Wavelength Dispersive X-ray Fluorescence Spectrometry
ASTM D4929-19 Standard Test Method for Determination of Organic Chloride Content in Crude Oil (procedure C)
SH/T 0977-2019 Using Monochromatic wavelength dispersive X-ray fluorescence spectrometr to determine Light liquid fuels determination of chlorine content
Pipeline terminals: interface cuts, custody transfer acceptance, and tank contamination prevention Refinery: for hydrofining unit and blending system
