GB/T 31926-2015 "Determination of lead, cadmium and chromium content in steel plates and steel strips, zinc-based and aluminum-based platings" Standard Glow discharge atomic emission spectroscopy (AES) method stipulates a method for the determination of lead, cadmium and chromium content in platings on the surface of steel plates and steel strips by Glow discharge atomic emission spectroscopy (AES) method. The method is suitable for steel with a thickness of platings of 1 μm to 50 μm, and the measurement range is lead 0.0035% to 0.2%, cadmium 0.003% to 0.2%, and chromium 0.002% to 0.02%. Measurement principles, reagents and materials, and equipment requirements are described in detail to ensure the accuracy and conformity of measurement results, providing a technical basis for the quality control of related materials.