浊点萃取（Cloud point extraction）是一种新型的液-液萃取技术，成本低，易分离且操作非常简单，在金属离子的分离富集中应用日趋广泛。

当表面活性剂水溶液加热超过一定温度时，溶液会出现浑浊，该温度称为浊点温度（Cloud Point）。利用浊点现象，样品中的亲水性物质与疏水性物质得以分离，该过程即为浊点萃取。

In the petroleum industry, cloud point refers to the temperature below which wax in diesel or biowax in biodiesels form a cloudy appearance. The presence of solidified waxes thickens the oil and clogs fuel filters and injectors in engines. The wax also accumulates on cold surfaces (e.g. pipeline or heat exchanger fouling) and forms an emulsion with water. Therefore, cloud point indicates the tendency of the oil to plug filters or small orifices at cold operating temperatures.