ASTM D7536 Dispersive X-ray Fluorescence Spectrometry

Scope:

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.

Procedure:

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.

Data:

The following data is calculated in ASTM D7536 testing:

S_o = [S_d × (M_o + M_b)/M_o] – [S_b × (M_b/M_o)] 

Where, 

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

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

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

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

Conclusion:

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