A method for the determination of Se(iv) and Se(vi) species in water samples is described based on the cathodic stripping voltammetry of copper selenide at the mercury electrode using an automated flow system. The use of a voltammetric flow-through cell facilitates the automation of the measurements. It is shown that the applied electrolyte exchange is reducing the matrix effect during the volt...

Differentiai pulse cathodic stripping voltammetry can be applied to sea water with high sensitivity for nickel and cobalt analysis (limits of detection about 0.005 and 0.002 j.lg L 1 respectively) using the dimethylglyoxime complexes. At concentrations of 0.200 j.lg Ni L -l and 0.050 j.lg Co L 1 the standard deviations for replicate analyses were 8% and 2% respectively. The linearity of the cal...

A square-wave voltammetric procedure for the electroanalytical determination of losartan and triamterene in Britton-Robinson buffer (pH 3.0, 0.1 mol L(-1)) as a supporting electrolyte containing 30 ng mL(-1) of copper ions was developed. Opposite to the case of triamterene, losartan can not be reduced at a mercury electrode alone, but a new peak appears at -0.25 V in the presence of copper due ...

A new procedure for the direct determination of picomolar levels of iron in seawater is presented. Cathodic stripping voltammetry (CSV) is preceded by adsorptive accumulation of the iron(III)-2,3-dihydroxynaphthalene (DHN) complex from seawater, containing 20 microM DHN at pH 8.0, onto a static mercury drop electrode, followed by reduction of the adsorbed species. The reduction current is catal...

Existing electrochemical methods for the determination of iron require long deposition times to determine low iron levels. Here a new method, based on catalytic cathodic stripping voltammetry, is described to determine subnanomolar levels of iron in seawater. The new method has a better baseline and is generally simplified, leading to a lower reagent blank and minimized sample handling compared...

Trace amounts of bismuth(III) and uranium(VI) can be simultaneously determined in a single scan by adsorptive cathodic stripping voltammetry in the presence of cupferron as a complexing agent. Optimal conditions were found to be: 0.1 mol L(-1) acetate buffer (pH 5.3), 5 × 10(-5) mol L(-1) cupferron, accumulation potential of -0.25 V, and accumulation time of 30 s. The linear range of Bi(III) an...

Granisetron showed one well-defined reduction peak at Hanging Mercury Drop Electrode (HMDE) in the potential range from -1.3 to -1.5 V due to reduction of C=N bond. Solid-phase extraction technique was employed for extraction of Granisetron from spiked human plasma. Granisetron showed peak current enhancement of 4.45% at square-wave voltammetry and 5.33% at cyclic voltammetry as compared with t...