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IEC TS 62607-6-19:2021(E) establishes a standardized method to determine the chemical key control characteristic

• elemental composition

for powder consisting of graphene-based material by

• CS analyser and ONH analyser.

The method as described in this document determines the content of carbon (C), sulfur (S), oxygen (O), nitrogen (N) and hydrogen (H).

The carbon (C) and sulfur (S) content in graphene powder is derived by the content of converted CO, CO2 and SO2, which is determined by infrared gas detector (IGD) using a non-dispersive infrared adsorption method in CS analyser.

The content of oxygen (O), nitrogen (N) and hydrogen (H) in graphene powder is derived by ONH analyser using pyrolysis method. The O content is obtained according to the content of converted CO and CO2, which is determined by IGD using a non-dispersive infrared adsorption method. The N content is obtained according to the content of converted N2, which is determined by a thermal conductivity detector (TCD) method. The H content is obtained by measuring converted H2 or H2O, corresponding to TCD or IGD method.

• The method is applicable for graphene, graphene oxide (GO) and reduced graphene oxide (rGO) in powder form.