Used to quantitatively measure immunoglobulin M (IgM) levels in rat biological samples such as serum, plasma, or cell culture supernatants. Commonly applied in immunological research to assess humoral immune responses in rat models. Helps in studying infections, autoimmune diseases, vaccine efficacy, and immune system development. The kit enables high-throughput analysis with high specificity and sensitivity, making it suitable for preclinical studies and laboratory research involving rat immune function.