The simultaneous voltammetric determination of iron and copper was accomplished by an unmodified screen-printed carbon electrode based on the complexation with o-phenanthroline assisted reducing agent ferrocyanide. detection limits were 3.74 0.34 µg L−1 for copper, respectively, a linear response observed from 12.5 to 400 1.14 copper. This method successfully avoids interferences between while ...

lead forms the complexes with xylenol orange in the basic solution. an adsorptivedifferential pulse stripping method for the determination of lead is proposed. the procedureinvolves an adsorptive accumulation of lead on a hanging mercury drop electrode (hmde) inthe presence of xylenol orange, followed by reduction of adsorbed lead by voltammetric scanusing differential pulse modulation. the opt...

Lead forms the complexes with xylenol orange in the basic solution. An adsorptivedifferential pulse stripping method for the determination of lead is proposed. The procedureinvolves an adsorptive accumulation of lead on a hanging mercury drop electrode (HMDE) inthe presence of xylenol orange, followed by reduction of adsorbed lead by voltammetric scanusing differential pulse modulation. The opt...

A commercial and disposable screen-printed carbon electrode (SPCE) has been proposed for a fast, simple low-cost determination of Ni(II) at very low concentration levels by differential pulse adsorptive stripping voltammetry (DPAdSV) in the presence dimethylglyoxime (DMG) as complexing agent. In contrast with previously methods, Ni(II)-DMG complex adsorbs directly on surface, no need mercury, b...

A disposable pump-free electrochemical microfluidic device made by using a multilayer lamination technique is proposed for diagnosis of glycosylation disorders. Thanks to the stacking polyethylene terephthalate (PET) films and double adhesive layers, it possible create geometry that allows filling tailored channels in fixed time. In main channel this passive device, necessary steps perform dete...

Trace metals play an important role in the regulation of primary productivity and phytoplankton community composition. Metal species directly affects biogeochemical cycling processes, transport, fate, bioavailability toxicity trace metals. Therefore, developing powerful methods for metal speciation analysis is very useful research a range fields, including chemical environmental analysis. Volta...