Cathodic preconcentration of f-elements on a mercury film carbon fiber disk microelectrode.

Field detection and quantification of f-elements is an important problem in radioanalytical chemistry requiring small, portable devices. Here, characterization of a 10 μm Hg film carbon fiber disk microelectrode to accumulate f-elements is described. Accumulation was performed by cathodic deposition and evaluated by anodic stripping and subsequent ICPMS analyses.

Preconcentration of f-elements from aqueous solution utilizing a modified carbon paste electrode.

An evaluation using paraffin oil based, Acheson 38 carbon paste electrodes modified with α-hydroxyisobutyric acid (HIBA) to preconcentrate f-elements cathodically is described. The modified paste was made by directly mixing solid HIBA into the carbon paste. A chemically reversible cyclic voltammogram for HIBA was observed on this modified carbon paste, which was found to be a non-Nerstian, single electron transfer process.

Preconcentration of trivalent lanthanide elements on a mercury film from aqueous solution using rotating disk electrode voltammetry.

An approach to concentrate trivalent lanthanide elements into or onto mercury film electrodes supported on rotating disk glassy carbon electrodes in small volumes ( View Article and Find Full Text PDF

What can be learned from studies of multisubstrate mechanisms of neuronal dopamine transport?

The dopamine transporter (DAT) is a Na+- and Cl--dependent transporter and, with respect to its three apparent substrates, both partially random sequential as well as ordered mechanisms have been reported. Here we describe some of the features of DAT, such as the coupling of energy to concentrate dopamine and the properties of slippage and leakage. Further, in considering the regulation of transport velocities by DAT few have considered issues related to substrate regulation of DAT activity.