Simultaneous Electrochemical Detection of Pb and Cd by Carbon Paste Electrodes Modified by Activated Clay

Blaise, Niraka; Valery, H G; Maallah, R; Oubaouz, Mohamed; Justin, Bakary Tigana Djonse; Ofudje, Edwin Andrew; Chtaini, Abdelilah

doi:10.1155/2022/6900839

Cited by 16 publications

(2 citation statements)

References 30 publications

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“…Certainly, with the role of the electronic vacancies of Pb( ii ) and Cd( ii ), a dative covalent bond with a tetragonal crystal structure 47 of Bi 24 Fe 2 O 39 can form. With a spacing distance between 0.161 and 0.280 nm of the synthesized nanoparticle, Pb( ii ) and Cd( ii ) having ionic radii of 0.15 nm and 0.095 nm, 48 respectively, will intercalate during the accumulation period. Later, during the voltammetric analysis, the metal ions will be reduced with the applied potential to their corresponding atoms.…”

Section: Resultsmentioning

confidence: 99%

Electrochemical detection of Pb(ii) and Cd(ii) using bismuth ferrite nanoparticle modified carbon paste electrodes

2022

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Section: Resultsmentioning

confidence: 99%

Electrochemical detection of Pb(ii) and Cd(ii) using bismuth ferrite nanoparticle modified carbon paste electrodes

2022

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“…In voltammetry, the working electrode can be modified to improve the performance and lower the detection limit. Some of the modifier materials can be used to analyze Pb, such as activated clay, biopolymer lignin, and crown ether (8)(9)(10). Crown ether can bind metals and form stable complexes because they have a cavity in the middle so that able to trap metal ion in the appropriate size (11).…”

Section: Introductionmentioning

confidence: 99%

Carbon Paste Electrode Modified by Dibenzo 18-crown-6 for the Determination of Pb in Carrot Using Differential Pulse Voltammetry

IRDHAWATİ,

WİJANA,

SAHARA

et al. 2023

Journal of the Turkish Chemical Society Section A: Chemistry

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In this research, the modification of carbon paste electrode (CPE) using dibenzo 18-crown-6 was carried out to detect Pb level in carrot. The purpose of this electrode modification is to increase the sensitivity of the measurement. The optimized parameters were scan rate, composition of dibenzo 18-crown-6 in carbon paste, and supporting electrolyte. Measurements were validated by determining the linear concentration range, detection limit (LoD), quantification limit (LoQ), repeatability, selectivity, and recovery. At the best measurement conditions, the modified CPE (CPE-Dbc) was applied to determine Pb in carrot. The optimum measurements conditions were obtained the optimum concentration of crown ether in carbon paste was 0.8%, the scan rate using CPE at 15 mV/s, increased to 20 mV/s, and H2SO4 solution as supporting electrolyte. The linear concentration was found in the range of 5-100 µg/L using CPE and became wider to 5-2000 µg/L using CPE-Dbc. The values of LoD and LoQ measurement using CPE were 0,3575 µg/L and 0,3583 µg/L, and decreased to 0,1265 µg/L and 0,1266 µg/L using CPE-Dbc. CPE and CPE-Dbc had good precision with Horwitz ratio values were 0,2231 and 0,2183, which is smaller than two. The percentage of recovery of Pb in the mixture of standard and sample solutions was (88,97 ± 2,76)%. The presence of Cu, Cd and Na in the solution did not interfere the measurement of Pb. The concentration of Pb in carrot sample was (1,8423 ± 0,0002) mg/kg, which was higher than the acceptable concentration according to SNI No. 7387:2009, which is 0,5 mg/kg.

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Determination of Lead(II) and Cadmium(II) in Selected Commercially Available Water‐Based Paints of Ethiopia by Anodic Stripping Voltammetry Using a Bismuth‐Modified Glassy Carbon Electrode

Muluneh,

Mekonnen,

Debebe

2023

ChemistrySelect

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Since the introduction of bismuth‐modified electrodes in Anodic Stripping Voltammetry, it has been used to determine heavy metals in various matrices. However, most reports focused on water samples due to fewer sample treatment requirements. In this study, Square Wave Anodic Stripping Voltammetry technique with a bismuth‐modified glassy carbon electrode is reported for the simultaneous determination of lead and cadmium content in paints. Analysis of paint samples collected from three industries in Ethiopia showed excellent percent recovery values ranging from 97.99–102.07 %. The Pb and Cd contents in these products have not been reported yet. The limits of detection were 0.06 μmol/L for Pb(II) and 0.13 μmol/L for Cd(II). The concentration of Cd(II) is not in the detectable range (ND) in all paint samples. The concentration Pb(II) in paint samples of DH‐Geda (Green 3.41±0.62 ppm, Red 14.05±0.91 ppm, violate 11.23±1.08 ppm and White 12.04±0.57 ppm), Nefas silk (Green 2.95±0.29 ppm, Red 3.16±0.36 ppm, violate 7.42±0.83 ppm, and White 6.93±0.79 ppm) and Tsehay (Green 4.40±0.67 ppm, Red ND, Violate ND, and White ND). These results are cross‐checked with AAS and the result is almost the same. This method is not significantly influenced by the paint matrix and can be used as an alternative analytical method for the determination of heavy metals in the paint matrix. The amount of Pb(II) and Cd(II) in the given paints are below the permissible levels based on the regulation of Ethiopia (90 ppm for Pb). Therefore, they are safe to use in the country.

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Simultaneous Electrochemical Detection of Pb and Cd by Carbon Paste Electrodes Modified by Activated Clay

Cited by 16 publications

References 30 publications

Electrochemical detection of Pb(ii) and Cd(ii) using bismuth ferrite nanoparticle modified carbon paste electrodes

Electrochemical detection of Pb(ii) and Cd(ii) using bismuth ferrite nanoparticle modified carbon paste electrodes

Carbon Paste Electrode Modified by Dibenzo 18-crown-6 for the Determination of Pb in Carrot Using Differential Pulse Voltammetry

Determination of Lead(II) and Cadmium(II) in Selected Commercially Available Water‐Based Paints of Ethiopia by Anodic Stripping Voltammetry Using a Bismuth‐Modified Glassy Carbon Electrode

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