This standard applies to the determination of cadmium content in lead concentrates, with a determination range of 0.03% to 0.2%. The method is determined by flame atomic absorption spectroscopy (AAS). After the sample is analyzed with muriatic acid and nitric acid, the air-acetylene flame is used in a dilute muriatic acid medium to measure the Absorbance of cadmium. The standard specifies in detail the preparation of reagents, the conditions of use of the instrument and the precautions in the determination process to ensure the accuracy and precision of the measurement results.