GB/T 8152.2-2006 provides for the determination of lead content in lead concentrate by lead sulfate settling-EDTA return Titrimetric method. It is suitable for all kinds of lead concentrate samples. First, the lead is settled and separated in the form of lead sulfate, and then the Miscellaneous metal ions are complexed with excess EDTA, and then the remaining EDTA is re-titrated with zinc standard solution, and the lead content is calculated. The standard specifies the required instruments, such as Burette, etc., and specifies the preparation and use of reagents. Detailed description of Sample Handling steps, including dissolve and settling operation details. Standardized titration process, according to this standard, the lead content of lead concentrate can be accurately determined, providing key data support for lead concentrate mass assessment and lead smelting process.