Used to measure levels of human immunoglobulin A (IgA) in biological samples such as serum, plasma, or saliva. Commonly applied in clinical research and diagnostics to assess immune system function. Helps in studying immune responses, mucosal immunity, and autoimmune diseases. Also used in monitoring patients with IgA deficiency, allergies, infections, and certain cancers. The kit enables high-throughput, accurate quantification through enzyme-linked immunosorbent assay (ELISA) method, making it valuable in both research and medical laboratories.