SELECTIVE BINDING MATERIALS AND ASSAYS

摘要

Use of indole ring containing compounds such as melanin and immobilised dopa and its polymers as a selective binding agent for concentrating target compounds for assay and immobilised forms of these for use in selective binding processes. Particularly provided are specific binding materials comprising melanin and oxidised dopa or tyrosine in a particulate form or immobilised forms, e.g. on a solid phase support, and apparatus such as filters and test kits containing these materials. beta 2-adrenergics particularly clenbuterol, and steroids, are readily concentrated from fluids such as urine utilising materials of the invention as capture and retention agent and release agents.