In this online presentation, Dr Daniela Held from PSS Polymer Standards Service GmbH in Mainz explains light scattering as an additional detection technique in detail. With this technique, particularly large molecules can be detected very sensitively. Dr Held puts light scattering in the context of the complementary MS technique. The lecture begins with a short introduction and relevant definitions of terms. In the further course of the presentation, Dr Held explains the detection method of light scattering in detail and, among other things, the influence of experimental parameters on the results and limitations of the technique.