The paper introduced the potential titrating method and color imetric titrating method,that were used to measure content of accelerator-sulfenamine and free amine.

• 阐述了指示剂滴定法测定次磺酰胺类促进剂纯度过程中影响测定结果准确性的两个因素:游离胺含量和硫基苯骈噻唑纯度。