Luminol concentration is an important factor that affects Chemiluminescence (CL) intensity. The intensity of Luminol chemiluminescence (LCL) does not depend on the concentration of Luminol alone, but also on other factors like concentration of oxidizing agents, enzymes, and pH. Maximum recorded CL intensity was at a Luminol concentration of 0.3 mM. CL intensity increased linearly with increasing concentrations of Luminol in the range of 0.01 to 0.3 mM. However, further increases of Luminol concentration caused a decrease in CL intensity.