ELISA and Immunoassays: Sample/standard diluent that reduces nonspecific binding and matrix effects while maintaining isotonic, phosphate-buffered conditions.

Antibody Dilution: Diluent for primary/secondary antibodies in ELISA, Western blot, and flow cytometry; BSA stabilizes antibodies and Tween-20 lowers background.

Blocking: Plate and membrane blocking to minimize nonspecific adsorption via BSA with mild surfactant to reduce hydrophobic interactions.

Wash Steps (Plate-Based Assays): Gentle washing to remove unbound reagents without disrupting antigen–antibody binding due to 0.05% Tween-20.

Lateral Flow Assays: Sample and conjugate pad diluent that stabilizes proteins and reduces nonspecific interactions.

Bead-Based Multiplex Assays: Reagent and sample diluent for Luminex-style assays to improve signal-to-noise.

Flow Cytometry Staining: Antibody staining and wash buffer that minimizes cell clumping and background staining.

Immunohistochemistry/Immunocytochemistry: Antibody diluent and mild blocker to enhance specificity in tissue and cell staining.

Specimen Dilution: Diluent for serum, plasma, urine, saliva, and culture supernatants to bring analytes into assay range and mitigate interferents.

Protein/Reagent Stabilization: Short-term stabilization of enzymes, calibrators, and standards during assay setup and handling.