Simultaneous determination of copper, zinc and lead by adsorptive stripping voltammetry in the presence of Morin

Shams, Esmaeil; Babaei, Ali; Soltaninezhad, M

doi:10.1016/j.aca.2003.09.010

Cited by 83 publications

(45 citation statements)

References 24 publications

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“…Deposition time for (Cd, and Zn) -AZ for conditions of AZ concentration of 0.5 mM, pH 5 and deposition potential -0.5 V. Shows an increase of up to 70 s, and this is because not the equilibrium of the reaction on the electrode surface and after 70 s no increase in peak current, it is because there has been an adsorptive equilibrium on the electrode surface, deposition time 70 s 43 used AdCSV for the determination of optimum conditions with AZ next. Figure 6 shows plots AdCSV with AZ versus deposition potential for a concentration of each 0:01 ug / L, with AZ 0.5 mM, and pH 5. when the adsorption of formed (Cd, and Zn) -AZ complexes were measured as a function of deposition potential (-0.2 to -1.0 V) at 60 s collection time, it was observed that peak current increased slightly when applying -0.5 V as the optimal accumulation potential.…”

Section: The Effects Of Deposition Timementioning

confidence: 99%

Adsorptive Cathodic Stripping Voltammetric Method with Alizarin for the Simultaneous Determination of Cadmium, and Zinc in Water Samples

Pardi¹,

Suyani²,

Zein³

2016

Orient. J. Chem

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This paper reports on the development of adsorptive cathodic stripping voltammetric (AdCSV) method with 1,2-dihydroxyanthraquinone or Alizarin (AZ) as a complexing agent used in the simultaneous determination of ultra trace of Cd and Zn because it has a good sensitivity, and selectivity. The influence of several parameters was studied: the effects of 1,2-dihydroxyanthraquinone or Alizarin (AZ) concentration, pH, accumulation potential, and accumulation time. The relative standard deviation (RSD), and recovery is determined to get the accuracy and precision method. It also determined the limit of detection (LOD) of the method to get the sensitivity. In this case, the optimum conditions were AZ concentration of 0.5 mM, pH 5, step deposition (70 s, -0.5 V). This method has been applied in water samples successfully, was obtained (Cd 23, and Zn 124)

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Section: The Effects Of Deposition Timementioning

confidence: 99%

Adsorptive Cathodic Stripping Voltammetric Method with Alizarin for the Simultaneous Determination of Cadmium, and Zinc in Water Samples

Pardi¹,

Suyani²,

Zein³

2016

Orient. J. Chem

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“…Even though Zn is ubiquitous in real samples and with this technique interference due to intermetal compounds is not significant, there are not many reports on the application of AdSV for the determination of zinc. They have used morin, 40 2-quinolinethiol, 41 aluminon, 42 tetramethylenedithiocarbamate 43 and catechol violet 44 as complexing agents. The lowest reported limit of detection was achieved using morin as ligand for zinc.…”

Section: Introductionmentioning

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.

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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.

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“…Most AdCSV procedures utilize a hanging mercury drop electrode (HMDE) to measure reducible species, which offers the advantages of self-cleaning, reproducible surface area, and automatic control capability 16 . Because of the great sensitivity enhancement obtained with AdCSV methods, several complexing agents have been studied for the adsorptive collection of Pb(II) complexes on the HMDE including 8-hydroxyquinoline 17 , xylenol orange 18 , calcein blue 19 , morin 20 , and thymolphthalexone 21 . 8-hydroxyquinoline (oxine) is a well known complexing agent for analytical determination of a number of cations of transition metals 22 .…”

Section: Introductionmentioning

confidence: 99%

Lead determination in canned food by square-wave adsorptive cathodic stripping voltammetry

Wararattananurak¹,

Chooto²,

Sherdshoopongse³

et al. 2014

ScienceAsia

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A sensitive and rapid method to analyse Pb(II) in canned fish samples was developed using square-wave adsorptive cathodic stripping voltammetry based on the adsorptive accumulation of 8-hydroxyquinoline complexes of Pb(II) onto a hanging mercury drop electrode, followed by reduction of adsorbed species by voltammetric scan with square wave pulse modulation. The optimum conditions were found to be 0.1 M CH 3 COONH 4 as a supporting electrolyte, pH 7.5, 8-hydroxyquinoline concentration of 15 µM, accumulation potential −0.70 V (versus Ag/AgCl), accumulation time 120 s, scan rate 0.3 V/s, and pulse amplitude 20 mV. Under the optimum conditions a linear calibration graph was obtained in the concentration range of 0.5-90.0 µg/l with correlation coefficient 0.9973, a limit of detection of 0.108 µg/l, and a limit of quantification of 0.360 µg/l. The recovery values were obtained in the range 93.7-95.1%. The relative standard deviations (n = 10) at lead concentration 5.0 µg/l was 2%. The method was successfully applied to the determination of lead content in canned fish samples. The concentration of Pb(II) in canned fish samples (wet weight) was found to be in the range of 0.121-0.285 µg/g, which is lower than the limit (1.00 µg/g) issued by the Ministry of Public Health of Thailand.

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Simultaneous determination of copper, zinc and lead by adsorptive stripping voltammetry in the presence of Morin

Cited by 83 publications

References 24 publications

Adsorptive Cathodic Stripping Voltammetric Method with Alizarin for the Simultaneous Determination of Cadmium, and Zinc in Water Samples

Adsorptive Cathodic Stripping Voltammetric Method with Alizarin for the Simultaneous Determination of Cadmium, and Zinc in Water Samples

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

Lead determination in canned food by square-wave adsorptive cathodic stripping voltammetry

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