GB/T 16840.3-2021

This standard specifies the use of Auger electron spectroscopy (AES) for analyzing the elemental composition of electrical fire evidence, such as melted copper or aluminum residues from short circuits. It is applied in forensic fire investigation and electrical safety testing to determine whether a fire originated from an electrical fault by identifying characteristic surface contaminants or alloy changes. The method is particularly relevant for Chinese regulatory and insurance contexts where precise material analysis is required to distinguish accidental electrical fires from other causes.