Fig. 3From: Ultrasensitive haptoglobin biomarker detection based on amplified chemiluminescence of magnetite nanoparticlesCL signal stability of the different MNPs modifications: bare MNPs; G-MNPs and Hb-MNPs, over time for the luminol system. The latter modification was assessed for three concentrations of catalyst: 1, 10, and 100 µg mL−1 of Hb. Inset: enlargement of the different MNPs modificationsBack to article page