描述了滴定法和比色法DPD方法的最新改进，其中硫代乙酰胺用作补充试剂，以确保在极端条件下准确测量游离有效氯。包括12个参考文献，表1。

Described is a recent modification to titrimetric and colorimetric DPD methods, in which thioacetamide is used as a supplementary reagent to ensure accurate measurement of free available chlorine under extreme conditions. Includes 12 references, table.