Crown ether-based structures for sensitive electrochemical detection

Simionca, Ioana-Maria; Arvinte, Adina; Pinteala, Mariana

doi:10.1177/0954008315584183

Cited by 3 publications

(3 citation statements)

References 23 publications

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“…For modification, e.g. clays quaternary ammonium salts are the most frequently used compounds, but n-alkyl-pyrrolidones, maleic anhydride, biomolecules, polymeric quaternary alkylammonium, alkyl-imidazolium and phosphonium salts have also been used for this purpose [2][3][4][5][6]. The areas of application of modified clays are wide including nanocomposites, adsorbents of organic and inorganic pollutants in soil, water, air, etc.…”

Section: Introductionmentioning

confidence: 99%

Solid-state synthesis and physico-chemical characterization of modified smectites using natural clays from Burkina Faso

Garikoé¹,

Sorgho²,

Guel³

et al. 2021

Bull. Chem. Soc. Eth.

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Solid-state intercalation was applied to prepare organo-smectites using cationic surfactants and natural clays containing smectite at various surfactant/smectite ratios. The surfactants enter the interlayers of smectites causing a swelling of the clays. The used clays were collected in Siétougou and Diabari villages located in the eastern part of Burkina Faso. The solid-state intercalation was successful for all four surfactants applied, n-dodecyltrimethylammonium bromide, (n-C12H25(CH3)3NBr), n-tetradecyltrimethylammonium bromide, (n-C14H29(CH3)3NBr), n-hexadecyltrimethylammonium bromide (n-C16H33(CH3)3NBr) and di-n-dodecyldimethylammonium bromide ((n-C12H25)2(CH3)2NBr) at different levels of the cation exchange capacity (CEC). The synthesized organo-smectites were characterized regarding relative density, structural and textural properties. XRPD data showed a systematic increase of the basal spacing of the unit cell of the smectite up to >38 Å at 2.0-CEC loading of the surfactant. This increase indicates that the surfactants penetrated into the smectite interlayers with the surfactants being arranged parallel to the layers at low concentrations and almost perpendicular at high ones. FTIR spectra of the organo-smectites showed a decrease in the intensities of the water bands at around 1630 cm-1 and 3400 cm-1, and new specific bands close to 2920 cm-1 and 2850 cm-1 were assigned to the asymmetric and symmetric stretching of CH2 groups of the surfactants, respectively. KEY WORDS: Smectite, Organo-smectite, Surfactant, Intercalation Bull. Chem. Soc. Ethiop. 2021, 35(1), 43-59. DOI: https://dx.doi.org/10.4314/bcse.v35i1.4

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Section: Introductionmentioning

confidence: 99%

Solid-state synthesis and physico-chemical characterization of modified smectites using natural clays from Burkina Faso

Garikoé¹,

Sorgho²,

Guel³

et al. 2021

Bull. Chem. Soc. Eth.

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“…147) and Pb 2+ (ref. [148][149][150] and other HMs [151][152][153] sensing applications. Crown ethers are cyclic compounds with remarkable ability to form selective strong complexes with metal and organic cations.…”

Section: Electrode Modificationsmentioning

confidence: 99%

Recent advances in portable heavy metal electrochemical sensing platforms

Ferrari

Carrington²,

Rowley‐Neale

et al. 2020

Environ. Sci.: Water Res. Technol.

119

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“…4-carboxybenzo-15-crown-5 graphite-epoxy composite electrodes had linear range concentration of 10.9-186.5 µg/L and LoD at 3.3 (10). The voltammetric response of N-(2hydroxypropyl)methacrylamide-co-Nacryloxysuccinimide with 2-aminomethyl-18-crown-6 (p(HPMA-NAS18C6))-modified electrode had linear response in the interval of 0.01-4.39 mg/L Pb(II), and LoD: 0.17 µg/L (13). Screen-printed carbon paste modified with siloxane-crown ether polyamide was used for Pb measurement and had linear concentration range from 50-2760 µg/L and LoD at 30 µg/L (14).…”

Section: Introductionmentioning

confidence: 98%

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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Crown ether-based structures for sensitive electrochemical detection

Cited by 3 publications

References 23 publications

Solid-state synthesis and physico-chemical characterization of modified smectites using natural clays from Burkina Faso

Solid-state synthesis and physico-chemical characterization of modified smectites using natural clays from Burkina Faso

Recent advances in portable heavy metal electrochemical sensing platforms

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

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