The microplate provided in this kit has been pre-coated with an antibody specific to Fibroblast Growth Factor 1, Acidic (FGF1). Standards or samples are then added to the appropriate microplate wells with a biotin-conjugated antibody specific to Fibroblast Growth Factor 1, Acidic (FGF1). Next, Avidin conjugated to Horseradish Peroxidase (HRP) is added to each microplate well and incubated. Then the mixture of substrate A and B is added to generate glow light emission kinetics. Upon plate development, the intensity of the emitted light is proportional to the Fibroblast Growth Factor 1, Acidic (FGF1) level in the sample or standard.