This standard specifies a method for the determination of mg, nickel, manganese and palladium in gold by flame atomic absorption spectroscopy (AAS). It is suitable for the determination of the content of these elements. The determination range is detailed in the standard schedule. The sample needs to be analyzed by mixed acid, and after the gold is extracted by ethyl acetate, the Absorbance of each element is measured at a specific wavelength using an air-acetylene flame. The standard details the preparation of reagents, instrumentation and operation procedures to ensure the accuracy and conformity of the determination.