Fig. 4From: A dual-quenched ECL immunosensor for ultrasensitive detection of retinol binding protein 4 based on luminol@AuPt/ZIF-67 and MnO2@CNTsOptimization of the detection conditions. A The effect of pH on the response of ECL intensity from luminol@AuPt/ZIF-67/GCE; B the concentrations of H2O2 in luminol/H2O2 coreactants; C the effect of GSH concentrations on the ECL immunosensor for detection 5 ng mL−1 RBP4 (error bars, SD, n = 3)Back to article page