Rapid determination of Se(IV) and tSe in fungal samples by foam electrode-based electrolytic hydride generation coupled atomic fluorescence spectrometry.

The key to accurately identifying trace heavy metal elements is to achieve efficient sample introduction while shielding the interference of matrix components. Taking the electrolytic hydride generation (EHG) technology as an example, this paper explored the effects of cathode materials and structural factors on the electrosynthesis of hydrogen selenide (HSe), particularly on suppressing interference from coexisting components. Systematic electrochemical and spectroscopic tests show that the nickel-based electrode can promote the generation of HSe, while the multi-layer foam structure with large specific surface area, rich pores and weak gas evolution effect improves the yield and stability of electrosynthesis reaction.

Highly sensitive analysis of trace germanium derived from the efficient electrosynthesis and spectral introduction of GeH on foam electrode.

Background: The electrochemical hydride generation technology, which uses electrolysis instead of chemical reagents to generate reducing species to achieve gaseous transformation and sample introduction of the tested elements, has received widespread attention in the field of atomic spectroscopy due to its simple, economical, and green characteristics. However, limited by the effective area of the electrode, the introduction efficiency and spectral signal of most elements (e.g.

Dual-potential electrochemiluminescence of single luminophore for detection of biomarker based on black phosphorus quantum dots as co-reactant.

Simultaneous cathodic and anodic electrochemiluminescence (ECL) emissions of needle-like nanostructures of Ru(bpy) (RuNDs) as the only luminophore are reported based on different co-reactants. Cathodic ECL was attained from RuNDs/KSO system, while anodic ECL was achieved from RuNDs/black phosphorus quantum dots (BPQDs) system. Ferrocene attached to the hairpin DNA could quench the cathodic and anodic ECL simultaneously.

An electrogenerated chemiluminescence aptasensor for lysozyme based on the interaction between Ru(bpy) and cucurbit[8]uril.

Strong anodic Ru(bpy) electrogenerated chemiluminescence (ECL) was obtained at a cucurbil[8]uril (CB[8]) modified electrode in neutral conditions without the need of an additional coreactant. An ECL aptasensor was fabricated based on the strong ECL emission as well as the host-guest interaction between DNA and CB[8]. Firstly, amino group-terminated complementary DNA (DNA-NH ) was firmly immobilized on CB[8]/glass carbon electrode, which could further increase ECL intensity.

Electrogenerated chemiluminescence of Ru(bpy) at MoS nanosheets modified electrode and its application in the sensitive detection of dopamine.

Electrogenerated chemiluminescence (ECL) of Ru(bpy) was studied at a MoS nanosheets modified glassy carbon electrode (MoSNS/GCE) in neutral condition. Electrochemical results revealed that MoS nanosheets could significantly catalyze the electrochemical oxidation of Ru(bpy), as a result, strong anodic ECL was obtained. Several impact factors, such as the modified amount of MoS nanosheets suspension, the pH value, and the concentration of Ru(bpy), were investigated to obtain the optimal experimental condition.

Electrochemiluminescence resonance energy transfer between luminol and black phosphorus nanosheets for the detection of trypsin via the "off-on-off" switch mode.

In this work, the electrochemiluminescence (ECL) behavior of a luminol-H2O2 system was studied on a black phosphorus nanosheet (BPN) modified electrode. A quenching effect of BPNs on luminol ECL was achieved based on ECL resonance energy transfer (ECL-RET) with excited state luminol as the energy donor and BPNs as the energy acceptor. Protamine could bind on the surface of BPNs through electrostatic interactions, which can cut off the energy transfer route between luminol and BPNs to restore the ECL signal.

Electrogenerated chemiluminescence aptasensor for lysozyme based on copolymer nanospheres encapsulated black phosphorus quantum dots.

Black phosphorus quantum dots (BPQDs) can react with Ru(bpy) to generate strong anodic electrogenerated chemiluminescence (ECL). However, the instability and the lack of functional groups on BPQDs limit its further application in the fabrication of ECL biosensor. In the present work, uniform BPQDs-styrene-acrylamide (St-AAm) nanospheres (BSAN) are synthesized by encapsulating BPQDs into St-AAm copolymer nanospheres.

Electrogenerated chemiluminescence of bismuth sulfide nanorods modified electrode in alkaline aqueous solution.

Electrogenerated chemiluminescence (ECL) behavior of a bismuth sulfide nanorods modified glassy carbon electrode (NR-GCE) was investigated in alkaline aqueous solution for the first time. One weak ECL peak of the NR-GCE was observed around -1.70 V when the electrode potential was scanned from 0.

Evaluation of a new electrolytic cold vapor generation system for mercury determination by AFS.

In this study we firstly report a new electrolytic cold vapor generation system for mercury determination on Pt/Ti cathode in the presence of organic acid catholyte. Comparing with the traditional inorganic acid, formic acid increased the signal intensity of Hg vapor from electrolytic generation on Pt cathode and reduced the impact of cathode erosion on the stability of signal intensity. Moreover, formic acid has better interference tolerance.