Used to quantitatively measure immunoglobulin A (IgA) levels in rat biological samples such as serum, plasma, or mucosal secretions. Commonly applied in immunology and biomedical research to assess immune response, monitor mucosal immunity, and evaluate the effectiveness of vaccines or treatments in rat models. Particularly useful in studies related to gastrointestinal infections, autoimmune diseases, and allergic responses where IgA plays a key role in immune defense. The kit enables high-throughput analysis with high specificity and sensitivity, making it ideal for preclinical research and laboratory diagnostics in animal studies.