Three-dimensional porous high boron-nitrogen-doped carbon for the ultrasensitive electrochemical detection of trace heavy metals in food samples

Hematite nanoparticle decorated MIL-100 for the highly selective and sensitive electrochemical detection of trace-level paraquat in milk and honey

“…The main electrochemical methods currently used for PQ detection are differential pulse voltammetry (DPV) [13], amperometry i-t curves (i-t curves) [14], and square wave voltammetry (SWV) [15]. In electrochemical sensors, the development of advanced materials capable of fast and sensitive capture of target molecules is at the core of electrochemical sensing devices [16].…”

MoS2 nanosheets grown on bowl-shaped hollow carbon spheres as an efficient electrochemical sensor for ultrasensitive determination of nephrotoxic aristolochic acids in Chinese traditional herbs

“…32 The EIS data were fitted using an equivalent circuit in which R s is the solution resistance, and R CT is the electron transfer resistance. 33 The difficulty of charge transfer was determined from the arc diameters in the high-frequency region: R CT (GCE) 763 Ω > R CT (MoS 2 /GCE) 217 Ω > R CT (BHCs/GCE) 76 Ω > R CT (MoS 2 –BHCs/GCE) 71 Ω. Modification with MoS 2 and BHCs reduced the electron transfer resistance of the GCE.…”

Fabrication of Hybrid Electrodes by Laser-Induced Forward Transfer for the Detection of Cu2+ Ions

“…Heavy metal trace detection is mainly carried out using spectroscopic techniques: atomic absorption spectroscopy [ 8 ], inductively coupled plasma mass spectroscopy [ 9 ], X-ray fluorescence, quartz crystal microbalance [ 10 ], and neutron activation analysis are the most commonly used. However, they suffer from several significant drawbacks, including tedious sample preparation, the need for expert knowledge, high operational costs, and lengthy analysis time (calibration, pre-concentration, preparation, sampling) [ 11 ], which make them unsuitable for real-time online and continuous monitoring applications.…”