The Cyclic Renewable Mercury Film Silver Based Electrode for Determination of Uranium(VI) Traces Using Adsorptive Stripping Voltammetry

Abstract

The new cyclic renewable mercury film silver based electrode (Hg(Ag)FE), applied for the determination of uranium(VI) traces using differential pulse adsorptive cathodic stripping voltammetry (DP AdCSV) is presented. The Hg(Ag)FE electrode with a surface area adjustable from 1.1 to 12 mm 2 is characterized by very good surface reproducibility ( 2%) and long-term stability (more than 2 thousand measurement cycles). The mechanical refreshing of mercury film is realized in the simple constructed device, in a time shorter than 1 -2 seconds. The effects of various factors such as: preconcentration potential and time, pulse height, step potential and supporting electrolyte composition are optimized. The calibration graph is linear from 0.4 nM (95 ng L , expressed as RSD is 2.5% (n ¼ 7). The proposed method was successfully applied and validated by studying the recovery of U(VI) from spiked river water and sediment samples.

How to Determine Uranium Faster and Cheaper by Adsorptive Stripping Voltammetry in Water Samples Containing Surface Active Compounds

“…Its presence in the environment results from anthropogenic activities such as nuclear industry, the combustion of coal and other fuels, and the use of phosphate fertilizers that contain uranium as well as natural processes e.g. rock erosion [1][2][3]. Generally it is found in ground water at concentrations below 15 mg L…”

“…Uranium concentration in environmental samples is most commonly measured by fluorimetry with either laser excitation [8][9][10] and spectrometric techniques, nowadays mainly inductively coupled plasma optical emission spectrometry [11,12], and inductively coupled plasma mass spectrometry [12][13][14][15]. A number of adsorptive stripping voltammetric (AdSV) procedures for trace uranium determination have also been developed [2,[16][17][18][19][20][21][22][23][24][25][26][27]. Among them the methods based on adsorptive accumulation of the U(VI)-cupferron complex seem to be most frequently used for U(VI) determination in natural water samples [16][17][18][19][20].…”

“…In the aqueous system, hexavalent uranium is commonly associated with oxygen as the uranyl ion, UO 2 2 + [5,7]. Uranium concentration in environmental samples is most commonly measured by fluorimetry with either laser excitation [8][9][10] and spectrometric techniques, nowadays mainly inductively coupled plasma optical emission spectrometry [11,12], and inductively coupled plasma mass spectrometry [12][13][14][15].…”

Voltammetric Determination of Isoniazid using Cyclic Renewable Mercury Film Silver Based Electrode

“…The simple construction of the applied electrode allows the mercury film to be refreshed before each measurement. The (Hg (Ag FE) electrode was successfully applied for the determination of many elements [51][52][53][54][55][56][57][58]. In this work differential pulse cathodic voltammetry for the determination of isoniazid was used.…”

Selective and Sensitive Determination of Uranyl Ions in Complex Matrices by Ion Imprinted Polymers‐Based Electrochemical Sensor

“…Currently,t he intense interest in uranium arises fromi ts known toxicity and the possibility of human exposure to it. Such exposure can cause acute renal failure,r esulting in af atality or minor damage to the liver [3].H ence, World Health Organization [ 4],N ational Health and Medical Research Council (NHMRC) of Australia [5], and United States Environmental Protection Agency (USEPA) [2] have regulated maximumc oncentration level of uraniumi nd rinking water to be 15, 20, and 30 ng mL À1 ,r espectively.T hus,d etermination of uranium requires high sensitivity and selectivity due to its strong association with other elements.T herefore,s everal analytical techniques such as inductively coupledp lasma atomic emission spectrometry [6],i nductively coupled plasma-masss pectrometry [7][8][9],n eutrona ctivation analysis,g amma and alpha spectrometry [ 10],g as chromatography [11,12],d ifferentialp ulse polarography [13],m ercury film silver based electrode [14],a nd electroanalysis using ion selective electrode [15][16][17] have been reported for uranium determination. Although thesem ethods benefit from ah igh sensitivity and favorable detection limits, their application requires expensive equipment and involves ah igherr unningc ost.…”