GB/T 26416.2-2010 is the second part of the series of standards for chemical analysis of dysprosium ferroalloys. This part uses Inductance coupled plasma emission Light spectrum method to determine the content of rare earth impurities in dysprosium ferroalloys. The standard describes the determination principle, specifies the required equipment, reagents, etc. The processing flow of the sample is described in detail, including the dissolving and preparatory of the sample, as well as the calibrating and measurement operation steps of the instrument. Through this standard, the rare earth impurities in dysprosium ferroalloys can be accurately determined, providing an important basis for their quality control, helping related industries to improve product quality and promote the standardization of the testing process.