Stabilizers of colloidal particles are often complex and their function may involve several mechanisms to impart stability of a wide range of conditions. Sodium polyacrylate is widely used as a stabilizer for a range of inorganic particles such as mineral pigments. It will work over a wide range of ionic strengths and so can apparently be used to work with primarily steric repulsion rather than by imparting charge stability. In industrial applications the ability to withsand changes in added salt is extremely valuable.It is often used as a low molecular mass product (just 3000 Daltons) but the mass distribution is apparently important. The present proposal is to use neutron reflection to investigate the adsorption and conformation of this stabilizer under a range of conditions at a model interface - alumina/water.