Review of adsorptive stripping voltammetry ? assessment and prospects

Kalvoda, R.

doi:10.1007/bf00323458

Cited by 43 publications

(19 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(27), (32) and (34) shows that the nature of the diffusive flux of the dissolved product in the stripping step significantly impacts the shape of the E/t transient, Fig. 2.…”

Section: The Strip Step 0 < T < Smentioning

confidence: 94%

Adsorptive stripping chronopotentiometry (AdSCP). Part 1: Fundamental features

Leeuwen

Town

2007

Journal of Electroanalytical Chemistry

View full text Add to dashboard Cite

“…(27), (32) and (34) shows that the nature of the diffusive flux of the dissolved product in the stripping step significantly impacts the shape of the E/t transient, Fig. 2.…”

Section: The Strip Step 0 < T < Smentioning

confidence: 94%

Adsorptive stripping chronopotentiometry (AdSCP). Part 1: Fundamental features

Leeuwen

Town

2007

Journal of Electroanalytical Chemistry

View full text Add to dashboard Cite

“…It is now generally used to denote the modification of the electrode with a ligand or similar compound. CMEs have been used for the determination of a large number of both organic and inorganic analytes and a number of reviews have been produced on its scope and application [64][65][66][67][68].…”

Section: Chemical Modified Screen-printed Carbon Electrodes For Metalmentioning

confidence: 99%

Screen-printed Electrochemical Sensors and Biosensors for Monitoring Metal Pollutants

Honeychurch¹

2012

Insciences J.

View full text Add to dashboard Cite

Abstract:The present review (with 231 references) focuses on developments made in the area of screen-printed biosensors and sensors for the determination of metal ions in industrial, environmental and biomedical applications. The year 2012 represents the twentieth anniversary of the first reported application of screen-printed electrodes for the determination of metal ions. Focus is placed on fabrication techniques, operating details and performance characteristics for the selected applications. The greater proportion of articles have utilised the technique of stripping voltammetry, gaining detection limits in the low ng/mL (ppb) region. An increasing percentage of these have explored bismuth as an alternative to mercury for the modification of the carbon electrode surface. However, a steady number of applications have shown the possibility of utilising the unmodified screen-printed carbon, gold or silver electrode surface. More recently the alternative approach of electrochemical biosensors has become a growing area. The majority of these have exploited the inhabitation metal ions exhibit on the enzyme activity of urease, acetylcholinesterase and glucose oxidase gaining detection limits in the sub µg/mL region, however recent applications utilising thiol-functionalised oligonucleotides have been shown the possibility of gaining detection limits as low as 120 ng/L for Hg .

show abstract

“…These samples were obtained from 4 beaches which are close to several industries, in a sector with a large population and tourism. Low reproducibility was obtained with some samples that had high concentrations of organic matter and these were previously digested under UV radiation in the presence of H 2 . High levels were found in the Las Ventanas beach next to a copper refinery.…”

Section: Seawater Sample Analysismentioning

confidence: 99%

Optimization of experimental parameters in the determination of zinc in sea water by adsorptive stripping voltammetry

Arancibia

Zúñiga

Segura

et al. 2010

J. Braz. Chem. Soc.

View full text Add to dashboard Cite

Otimizamos um procedimento para a detreminação de zinco em água do mar usando voltametria de redissolução de onda quadrada (SWAdsV) com 8-hidroxiquinolina (oxina) como adsorvente e agente complexante. Inicialmente um estudo univariante da corrente máxima do complexo Zn-Ox em função do pH foi feito para obter os valores adequados de corrente. Posteriormente as condições experimentais foram selecionadas usando um planejamento multivariado experimental. Variaveis como pH, concentração de oxina (C ox ), tempo (t ads ) e potencial (E ads ) de adsorção foram otimizados. O primeiro passo de otmimização foi um planejamento fatorial de 2 4 com 16 medidas, usando valores altos e baixos e tres medidas no ponto central (10.0 µg L -1 Zn(II)). Analises de variança mostraram que o pH e a C ox foram os fatores mais significantes, enquanto t ads e E ads não foram significativos, sendo mantidos constantes nos experimentos seguintes. Para encontrar então os valores ótimos de pH e C ox um planejamento fatorial de 2 2+* foi usado. Os melhores paramentros experimentais foram pH 6,0; C ox 25 mmol L ) com resultados satisfatórios. O método pode ser aplicado para a determinação de zinco II em água do mar, sem tratamento prévio.A procedure for the determination of zinc in sea water by square wave adsorptive stripping voltammetry (SWAdSV) using 8-hydroxyquinoline (oxine) as an adsorbing and complexing agent has been optimized. First, a univariate study of the Zn-Ox complex peak current as a function of pH was carried out choosing values at which adequate currents were obtained. Then, selection of the experimental conditions was made using a multivariate experimental design. Variables like pH, oxine concentration (C ox ), adsorption time (t ads ) and adsorption potential (E ads ) were optimized. The first optimization step was a 2 4 factorial design with 16 measurements made choosing high and low levels, and three measurements at the central point (Zn(II) 10.0 µg L -1 ). Analysis of variance showed that pH and C ox were the most significant factors, while t ads and E ads were not significant and were kept constant in later measurements. Next, to find the optimum values for pH and C ox a 2 2 + star factorial design was used. The best experimental parameters were pH = 6.0; C ox = 25 µmol L -1 ; t ads = 10 s and E ads = -0.70 V. Under these conditions the peak current was proportional to the concentration of zinc over the 0.1-48.0 µg L -1 range, with a detection limit of 0.05 µg L -1. Reproducibility for 5.0 µg mL -1 Zn(II) solution was 1.9 % (n = 16). The method was validated using spiked synthetic sea water (ASTM D665), sea water reference material (CRM-SW. Zn 5 µg kg -1 ) and fortified water reference material (GBW08607. Zn 5 mg kg -1 ) with satisfactory results. Finally, the method was successfully applied to the determination of Zn(II) in sea water samples without prior treatment.

show abstract

Review of adsorptive stripping voltammetry ? assessment and prospects

Cited by 43 publications

References 57 publications

Adsorptive stripping chronopotentiometry (AdSCP). Part 1: Fundamental features

Adsorptive stripping chronopotentiometry (AdSCP). Part 1: Fundamental features

Screen-printed Electrochemical Sensors and Biosensors for Monitoring Metal Pollutants

Optimization of experimental parameters in the determination of zinc in sea water by adsorptive stripping voltammetry

Contact Info

Product

Resources

About