GB/T 1819.10-2004 specifies two methods for the determination of sulfur content in tin concentrates. High-frequency infrared absorption method, which uses the absorption characteristics of sulfur dioxide produced by sample combustion in the infrared band to measure sulfur content; combustion-potassium iodate Titrimetric method, which is based on the reaction of sulfur dioxide generated by combustion and potassium iodate to titrate to determine sulfur content. This standard is applicable to all kinds of tin concentrates. Specify the required instruments, such as high-frequency infrared carbon sulfur meter, titration device, etc., and specify the preparation of reagents. Detailed description of Sample Handling, combustion conditions and operation procedures. According to this standard, the sulfur content of tin concentrate can be accurately determined, providing key data for tin concentrate mass evaluation and smelting process formulation.