Simultaneous Determination of Cd2+ and Pb2+ Using a Chemically Modified Electrode

Zhang, Shenghui; Huang, Wensheng

doi:10.2116/analsci.17.983

Cited by 16 publications

(12 citation statements)

References 11 publications

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“…AdSV was selected as an alternative method because it has many advantages such as high salinity of the seawater does not interfere with the analysis, high sensitivity, detection limit low on the scale µg/L, simple sample preparation, rapid analysis, low infrastructure cost [13][14][15][16][17][18][19] . In addition to this method, it is possible to learn chemical species of heavy metals [20][21] , which can not be done with other methods. From the previous research, to find the optimization the determination of metal ions Cd, Cu, Pb and Zn 6,13 , and metal ions Fe, Co, Ni, and Cr 16 either in the form of single or simultaneous AdSV, carried out by observing the effect of one variable is changed, while the other variables are kept at a constant level.…”

Section: Copper In Fruit and Vegetable Samplesmentioning

confidence: 99%

"Application of Central Composite Design Optimization Technique for Determination of Copper in Fruit and Vegetable Samples With Adsorptive Stripping Voltammetry in the Presence of Calcein "

2017

RJC

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This study was to optimize the determination of copper by adsorptive stripping voltammetry (AdSV) in the presence calcein. The independent factors that affect the response were: calcein concentration, pH, potential accumulation and time accumulation. The research design was used a central composite design (CCD) with 4 variables, 5 levels and 31 a combination of treatments. The first step of 2 k factorial design optimization is: to give the highest level of code values (+1.68), the lowest level (-1.68) and code (0) as the center point. Programs were used for statistical data processing, Minitab 17. The obtained optimum conditions for the determination of copper were: calcein concentration 0.11 mM, pH 6.8, potential accumulation -0.88 V and time accumulation 42.34 s. The RSD 0.74%, recovery 99.88%, the linear calibration graph for the concentration (0.2 -110.0) µg/L, and the detection limits 1.79 µg/L. This procedure was applied for the determination of copper in the fruit and vegetable samples with satisfactory results.

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Section: Copper In Fruit and Vegetable Samplesmentioning

confidence: 99%

"Application of Central Composite Design Optimization Technique for Determination of Copper in Fruit and Vegetable Samples With Adsorptive Stripping Voltammetry in the Presence of Calcein "

2017

RJC

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“…Voltammetri dipilih sebagai metode alternatif karena memiliki banyak kelebihan, antara lain: kadar garam yang tinggi dari air laut tidak mengganggu dalam analisis, memiliki sensitivitas tinggi, limit deteksi rendah pada skala μg/L (ppb), penggunaan dan preparasi sampel yang mudah, analisis cepat, dan infrastruktur yang murah [5][6][7] . Disamping itu, dengan metode ini dimungkinkan mempelajari spesi kimia dari logam berat [8] , yang tidak bisa dilakukan dengan metode lain.…”

Section: Pendahuluanunclassified

The Optimation Simultaneuos Determination of Lead(ii) and Cadmium(ii) by Adsorptive Stripping Voltammetry (Adsv)

et al. 2012

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A selective and sensitive adsorptive stripping voltammetric (AdSV) method for simultaneous determination of lead(II) and cadmium(II) were proposed. The aim of this study was to get the optimum condition for simultaneuos determination of lead(II) and cadmium(II). The parameters were studied such as: variation of accumulation potential, accumulation time, pH, and variation of calcon concentration. In this case, the optimum conditions were reached at accumulation potential -0.7 V, accumulation time 80 s, concentration of 0.12 mM calcon, and pH 7.0. At the optimum conditions the relative standard deviation were 2.90% and 1.46% for Pb(II) and Cd(II) respectively for eight replicates (n = 8) measurements. The method was applied for the direct determination of Pb(II) and Cd(II) in sea water around Bungus, Padang City. Concentration Pb(II) and Cd(II) in sample were 9.918 μg/L -27.320 μg/L for Pb(II) and 7.997 µg/L -32.521 μg/L for Cd(II), with recovery of 99.48%, and 103.28 for Pb(II), and Cd(II) respectively. Keywords : Lead, cadmium, adsorptive, stripping, voltammetry, simultaneous PENDAHULUANDampak negatif dari pertumbuhan industri serta pemukiman yang cukup pesat adalah bertambahnya jumlah logam berat beracun di lingkungan. Beberapa unsur yang termasuk dalam kategori logam berat seperti: As, Cr, Cd, Pb, Fe, Cu, Co, Hg, Se, Sb, Mn, Zn, dan Ni berasal dari limbah industri dan hasil aktivitas penduduk, khususnya di kota besar. Adanya logam-logam berat dalam lingkungan termasuk bahan makanan sangat berbahaya karena mempunyai tingkat toksisitas yang tinggi [1] . Apabila masuk ke dalam tubuh manusia mempunyai kecenderungan berkumpul dalam organ tubuh dan tidak bisa keluar lagi melalui proses pencernaan. Air, tanah, dan udara adalah media yang dapat digunakan untuk penyebaran logam berat ke lingkungan. Tanaman yang berdaun lebar disamping menyerap logam berat dari tanah juga dapat menyerap logam berat dari udara [2] . Permasalahan dalam penelitian ini adalah karena ion-ion logam berat Pb dan Cd dalam perairan sangat berbahaya, yang bersifat toksik sehingga merusak lingkungan dan kehidupan biota dari perairan tersebut jika kadarnya telah melampaui ambang batas yang ditetapkan. Diketahui kadar ion-ion logam tersebut dalam perairan dan dalam bahan lingkungan, baik tanah, batuan maupun bahan biologi sangat kecil sekali (runut) dalam orde ng/kg sampai dengan mg/kg, sementara matrik sampel (misalnya kadar garam dalam air laut) cukup besar dan juga terikat dalam matrik yang kompleks.Metode yang ada untuk analisis ion-ion logam diantaranya metode Flame Atomic Absorption Spectrometry (FAAS), metode inductively coupled plasma-atomic emision spectrophotometry (ICP-AES). Namun, kedua metode ini membutuhkan biaya yang mahal dan kurang praktis. Selain itu, juga tidak dapat mengukur kadar ion-ion logam yang sangat kecil [3] . Walaupun sebelumnya telah dilakukan prekonsentrasi (pemekatan) untuk mengurangi atau menghilangkan kadar garam yang cukup tinggi dari sampel berupa air laut dengan menggunakan metode ekstraksi pelarut [4] . ...

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“…Therefore we need a sensitive and selective method for determining the levels of trace amounts of metal ions, namely the adsorptive stripping voltammetry (AdSV). Adsorptive stripping voltammetry is chosen as an alternative method because it has many advantages including: high salt content from seawater not disturbing in analysis, high sensitivity, low detection limit on µg/L scale (ppb), easy use and easy sample preparation, rapid analysis, inexpensive infrastructure [4][5][6][7][8][9][10][11][12] . In addition, by this method, it is possible to study the chemical specimens of heavy metals 13 , which can not be done by other methods.…”

Section: Introductionmentioning

confidence: 99%

Optimization for the Simultaneous Determination of Zinc in Environmental Samples With Calcon by Adsorptive Stripping Voltammetry : Response Surface Methodology

Suyani¹,

Rahmi²,

Pardi³

2017

Orient. J. Chem

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A procedure for the optimization simultaneous determination zinc by adsorptive stripping voltammetry has been done. The purpose of this study was to obtain the optimum condition of zinc simultaneously. To achieve these objectives, required an optimization technique by using response surface methodology (RSM), with central composite design (CCD). The research design was used CCD with 4 variables, 3 level and 31 a combination of treatments. The first step of 2 k factorial design optimization is: to give the highest level of code values (+1), the lowest level (-1) and code (0) as the center point. Programs have been used for statistical data processing, namely Minitab using RSM. Based on data analysis, the obtained optimum conditions for the simultaneous determination of zinc is the calcon concentration of 0.7018 mmol/L; pH = 7.1845; accumulation potential -0.5628 V, and the accumulation time 62.16 s. The optimum conditions obtained relative standard deviation (RSD) 2.5%, recovery of 98.01%,linier range (0.2-105) µg/L, and limit of detection (LOD) 1.21 (µg/L). This RSM has been successfully applied to the simultaneous determination of zinc in environmental samples.

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Simultaneous Determination of Cd2+ and Pb2+ Using a Chemically Modified Electrode

Cited by 16 publications

References 11 publications

"Application of Central Composite Design Optimization Technique for Determination of Copper in Fruit and Vegetable Samples With Adsorptive Stripping Voltammetry in the Presence of Calcein "

"Application of Central Composite Design Optimization Technique for Determination of Copper in Fruit and Vegetable Samples With Adsorptive Stripping Voltammetry in the Presence of Calcein "

The Optimation Simultaneuos Determination of Lead(ii) and Cadmium(ii) by Adsorptive Stripping Voltammetry (Adsv)

Optimization for the Simultaneous Determination of Zinc in Environmental Samples With Calcon by Adsorptive Stripping Voltammetry : Response Surface Methodology

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