中文摘要：

浊点是非离子表面活性剂的一个特征常数，在实际应用中起着重要的作用。选取一种吡咯烷酮样品，首次采用共振光散射的新方法测定其浊点，并与紫外可见光谱法和动态光散射法进行对比。3种方法测定浊点温度分别为34．3℃、31．7℃、34．7℃。实验结果表明，共振光散射法测定的浊点温度与紫外可见光谱法和动态光散射法非常接近。

英文摘要：

The cloud point is one of the characters for non-ionic surfactants and plays an important role in practical application. A new method for the determination of the cloud point by resonance light scattering was proposed. The cloud point of a pyrrolidone sample was determined by the new method and the results were compared with those of UV spectroscopy method and dynamic light scattering method. The cloud point temperatures measured by the three methods were 34.3 ℃, 31.7 ℃ and 34.7 ℃, respectively. Experimental results indicate that the cloud point temperature measured by resonance light scattering is very close to those by UV spectroscopy and dynamic light scattering.