Our research is aiming at studying and developing new, rapid, economic and user-friendly bioanalytical methods. To do this, we prepare synthetic functionalized derivatives and bioconjugates of small organic molecules (haptens), and generate our own high-affinity polyclonal and monoclonal antibodies specific of the target compound. With these immunoreagents, we develop alternative immunochemical methodologies (microplate-based immunoassays, affinity columns, immunochromatographic strips, bioactive nanoparticles, etc.) which we validate for the determination of chemical residues and contaminants (pesticides, hormones, additives, antibiotics, mycotoxins, phycotoxins, etc.) in environmental and food samples.