6. The ΔA652 response of the assay system toward sulfate and other anions and metallic ions (A) and interference study of the Tenovin-6 in the presence of a mixture of sulfate and other interferences (B). Concentrations: 20 μM for sulfate, sulfide, and Cu2+, 100 μM for other ions.Figure optionsDownload full-size imageDownload as PowerPoint slide
3.4. Analytical performance of the sensing system
Under the optimized conditions aforementioned, the cyst-AuNPs were used to catalyze the TMB–H2O2 reaction after incubation with different concentrations of SO42− and centrifugation. As shown in Fig.