Abstract: A parallel high throughput screening method on a solid support is disclosed that allows the detection of low affinity binding partners, comprising the steps of:(a) providing a library of different ligands;(b) forming a binding matrix comprising the ligands on a solid support by immobilising said ligands on the support; (c) contacting a target of interest with said binding matrix; (d) parallely determining a binding value of the ligand/target interaction for each type of ligand comprised in the binding matrix; (e) selecting those ligands the binding value of which in an immobilised state towards the target exceeds a predetermined threshold; (f) evaluating the affinity of each of the ligands selected in step (e) in a non-immobilised state towards the target; (g) identifying at least one ligand of step (f) as low affinity binding ligand.