Liangrui Lv,Qin Tao,Yijing Kuang,Tingting Zhang,Xiaoying Wang
Patulin (PAT) is a widespread fruit toxin. Trace-level PAT exposure can cause serious harm to human health. Herein, a multimodal PAT aptasensor was designed based on Ru(bpy) 3 2+ -based metal organic framework composited hydrogel (RuMOF@hydrogel) and versatile banana peel-derived carbonized polymer dots (BPPDs). RuMOF@hydrogel modified magnetic-electrode exhibited excellent anodic and cathodic electrochemiluminescence (ECL) emission and stability. Meanwhile, the BPPDs could enhance anodic ECL of RuMOF@hydrogel, and also show excellent fluorescence (FL) and photothermal (PT) properties. With the aid of PAT-triggered hybridization chain reaction and magnetic separation, ECL, FL, and PT responses could be recorded concurrently. The detection limit can reach as low as 0.25 fg mL −1 . The ratiometric ECL quantitation ensured the sensitivity and accuracy of this assay. And visual FL and portable PT modes contributed to the utility. Furthermore, this aptasensor demonstrated better performances than HPLC in fruit products and the protocol can be extended to determine various contaminants in foods.
Graphical In this study, we present the novel combination of AE-TPEA with RuMOF to construct an electrochemiluminescence (ECL) sensor using a TPEA-RuMOF composite material specifically for copper ions (Cu 2+ ) detection. Using K 2 S 2 O 8 as a co-reactant, we explored the ECL behavior of the TPEA-RuMOF modified electrode, enabling the quantitative detection of Cu 2+ . Remarkably, this sensor exhibited a wide linear range from 1×10 −5 to 1×10 −9 M (R 2 =0.998) and boasted a detection limit as low as 0.41 nM, which is considerably below the EPA (Environmental Protection Agency) permissible copper ion concentration in drinking water of <1.3 mg/L. our synthesized probe offers enhanced stability and selectivity in copper ion detection. This indicates its considerable potential for high-performance copper ion detectors. We further validated the analytical applicability of this sensor using river water samples. In this study, we present the novel combination of AE-TPEA with RuMOF to construct an electrochemiluminescence (ECL) sensor using a TPEA-RuMOF composite material specifically for copper ions (Cu 2+ ) detection. Using K 2 S 2 O 8 as a co-reactant, we explored the ECL behavior of the TPEA-RuMOF modified electrode, enabling the quantitative detection of Cu 2+ . Remarkably, this sensor exhibited a wide linear range from 1×10 −5 to 1×10 −9 M (R 2 =0.998) and boasted a detection limit as low as 0.41 nM, which is considerably below the EPA (Environmental Protection Agency) permissible copper ion concentration in drinking water of <1.3 mg/L. our synthesized probe offers enhanced stability and selectivity in copper ion detection. This indicates its considerable potential for high-performance copper ion detectors. We further validated the analytical applicability of this sensor using river water samples.
危险品化学品经营许可证（带存储）