METHOD FOR DETERMINATION OF HEAVY METALS IN TECHNICAL CARBON Russian patent published in 2016 - IPC G01N23/223 

FIELD: chemistry.

SUBSTANCE: invention can be used to determine content of heavy metals in technical carbon. This invention consists in that calibration instrument is performed using dispersive x-ray fluorescence spectrometry for each element, intensity of analytical line element on corresponding wavelength I_e (p/s) is recorded, calibration curve is constructed based on obtained data; this curve is dependence of relative intensity of analytical line element I_relative on determined element weight fraction in reference samples C (%), analytical element line intensity is measured on corresponding wavelength I_e (p/s), background intensity is measured at points of spectrum corresponding to beginning and end of element measuring range, intensity of background arithmetic mean value is calculated in points of spectrum corresponding to beginning and end of element measuring range I_fe (p/s), relative intensity of analytical line of each element of I_relative is calculated, weight ratio of elements in ash is found by calibration curve.

EFFECT: technical result is possibility of determining content of heavy metals in technical carbon with high accuracy.

1 cl, 1 dwg, 1 tbl