This standard specifies methods for the determination of cadmium content in lead and lead-cadmium alloys, applicable to the determination range of cadmium content from 0.0001% to 0.01% and 0.3% to 2.0%. Lead is separated by dissolving the sample with nitric acid, lead sulfate precipitation, cadmium Absorbance measurement at a wavelength of 228.8 nm using the Flame Atomic Absorption Spectrometer (FAAS), and cadmium content is calculated using the standard Linear dispersion method. The standard provides detailed instructions on the preparation of the reagent, the calibration of the instrument and the operation steps to ensure the accuracy and repeatability of the determination.