GB/T 15057.8-1994 stipulates the determination method of sulfur content in limestone for chemical industry, including barium sulfate weight method and combustion-potassium iodate Titrimetric method. This standard is applicable to all kinds of limestone samples for chemical industry. The barium sulfate weight method measures sulfur by settling reaction, and the combustion-potassium iodate Titrimetric method relies on combustion conversion and titration. The standard specifies the instruments and reagents required for each method, and details the Sample Handling, experimental operation steps, such as sample analysis, settling filtrate, titration process, etc. Through these two methods, the sulfur content of limestone can be accurately determined, helping the chemical industry to control the mass of raw materials.