Polymers and surfactants are key components in detergency. Understanding their interactions is essential to formulate smartly. Detergent formulations usually contain a mixture of stabilisers, but it is not clear whether their interactions are synergistic or antagonistic. In a previous experiment (RB1010354), SDS was shown participate in the surfactant-mediated desorption of PVP from the silica interface; this time the effect of introducing a non-ionic surfactant into the system will be studied. Isotopic combinations and contrast match methods will be used to investigate the composition and structure of the adsorbed layer.