Used to measure granulocyte colony-stimulating factor (G-CSF) levels in human biological samples such as serum, plasma, or cell culture supernatants. It is commonly applied in clinical research and immunology studies to assess immune system activity, monitor inflammatory conditions, and evaluate responses to treatments involving hematopoiesis. The kit helps in studying diseases like neutropenia, cancer, and autoimmune disorders where G-CSF plays a role in white blood cell production and immune regulation. Its high sensitivity and specificity make it suitable for detecting low concentrations of G-CSF in small sample volumes.