ASTM D7536 Dispersive X-ray Fluorescence Spectrometry

The ASTM D7536 test technique covers the estimation of chlorine by monochromatic, frequency dispersive X-beam fluorescence (MWDXRF) spectrometry in sweet-smelling hydrocarbons, their subsidiaries, and related synthetic substances. The qualities expressed in SI units are to be viewed as standard.

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    ASTM D7536 is used to estimate the chlorine content of aromatics with insignificant example readiness and examiner association. The standard time for each examination is five or ten minutes.


    In ASTM D7536, a monochromatic X-beam bar with a frequency suitable to energize the K-shell electrons of chlorine is engaged in a test example contained in an example cell. The fluorescent Kα radiation at 0.473 nm (4.73å) transmitted by chlorine is gathered by a fixed monochromatic analyzer. The power (counts per second) of the chlorine X-beams is estimated utilizing an appropriate identifier and changed over to the centralization of chlorine (mg/kg) in a test example using an adjustment condition. Excitation by monochromatic X-beams diminishes the foundation, improves network amendment, and expands the sign/foundation proportion contrasted with polychromatic excitation used in ordinary WDXRF procedures.

    Video 01: Working mechanism of an X-ray fluorescence spectrometer

    Specimen size:

    Monochromatic Wavelength Dispersive X-ray Fluorescence (MWDXRF) Spectrometer, prepared for X-ray discovery at 0.473 nm (4.73å) and X-ray source is required in ASTM D7536 testing.


    The following data is calculated in ASTM D7536 testing:

    So = [Sd × (Mo + Mb)/Mo] – [Sb × (Mb/Mo)] 


    Sd is the concentration of chlorine (mg/kg) in the test specimen of the diluted sample, 

    Mo is the mass (in g) of the original model, 

    Mb is the mass (in g) of the base material used to dilute the piece, and 

    Sb is the concentration of chlorine (mg/kg) in the diluent.


    ASTM D7536 is used to estimate the chlorine content of aromatics with insignificant example readiness and examiner association.


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