Determination of the dynamic viscosity of transparent fluids by using dynamic light scattering

The application of dynamic light scattering to the determination of the dynamic viscosity of transparent liquids is shown by the use of low-power (10-mW) laser sources and a multiple-tau correlator. A novel data evaluation scheme is demonstrated by the application of a nonlinear fit to various intervals of lag times, which can detect relevant systematic errors. An appropriate experimental procedure permits results with good accuracy and precision for selected liquids.