Electrochemical preconcentration coupled with spectroscopic techniques for trace lead analysis in olive oils

Baldo, M. Antonietta; Stortini, Angela Maria; Oliveri, Paolo; Leardi, Riccardo; Moretto, Ligia Maria; Ugo, Paolo

doi:10.1016/j.talanta.2019.120667

Cited by 15 publications

(2 citation statements)

References 33 publications

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“…Separation and preconcentration methods including solid phase extraction (SPE) [ 2 ], liquid-liquid extraction (LLE) [ 11 ], cloud point extraction [ 12 ], precipitation [ 13 ], flotation [ 14 ], electrochemical deposition [ 15 ], membrane filtration [ 16 ] have been extensively used to separate and preconcentrate trace metals prior to detection. Among these methods, SPE is a simple and cost-effective method for separation and preconcentration of target analytes and overcomes many drawbacks such as usage of excessive solvent amount, laborious and time-consuming laboratory procedures.…”

Section: Introductionmentioning

confidence: 99%

Schiff base functionalized silica gel for simultaneous separation and preconcentration of Cu(II), Ni(II), and Cd(II) in pharmaceuticals and water samples

TOKAY¹,

BAĞDAT²

2022

Turkish Journal of Chemistry

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A method for separation and preconcentration of Cu(II), Ni(II), and Cd(II) using N-N′-bis(5-methoxsalicylidene)-2-hydroxy-1,3-propanediamine modified silica gel was improved for aqueous samples and pharmaceuticals. Determination of the analytes was achieved by inductively coupled plasma optic emission spectrometry. The experimental conditions including pH value, sample volume, eluent type and volume, sorbent mass, sample, and eluent flow rates were optimized with univariate and multivariate optimization tools. The relative standard deviations of the method were 2.9% for Cu(II), 3.0% for Ni(II), and 3.3% for Cd(II) with recovery values between 98.8 ± 3.2–101.5 ± 3.0%. The limits of detection were found to be 62.4, 39.5, and 28.2 ng L −1 for Cu(II), Ni(II), and Cd(II), respectively. The accuracy of the suggested procedure was tested with the certified reference material (Certipur ICP multi-element standard solution IV) and addition-recovery experiments. The method was successfully applied to eye drop, anesthetic, serum, tap water, mineral water, and spring water samples.

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Section: Introductionmentioning

confidence: 99%

Schiff base functionalized silica gel for simultaneous separation and preconcentration of Cu(II), Ni(II), and Cd(II) in pharmaceuticals and water samples

TOKAY¹,

BAĞDAT²

2022

Turkish Journal of Chemistry

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“…Metals content in vegetable oils is commonly determined by spectrometric methods, such as flame atomic absorption spectrometry (FAAS) (de Souza et al, 2005), (Bornhorst et al, 2018), (Adhami et al, 2020), graphite furnace atomic absorption spectrometry (GFAAS) (Mohebbi et al, 2018), (Almeida et al, 2019), (Manjusha, Shekhar and Kumar, 2019), (Baldo et al, 2020), inductively coupled plasma mass spectrometry (ICP-MS) (Fu, Xie and Shi, 2018), (Luka and Akun, 2019) and inductively coupled plasma optical emission spectrometry (ICP-OES) (Oner et al, 2021),(Tokay et al, 2021. Among all these techniques, flame atomic absorption spectrometry (FAAS) is much more demanding because of its simplicity, availability, and low cost of analysis.…”

Section: Introductionmentioning

confidence: 99%

Development Method for The Determination of Cr, Cd And Pb in Edible Sunflower Oil Using Emulsion Extraction-faas

2023

UOD

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The presence of heavy metals in vegetable oils has negative health effects when consumed by living organisms. As a result, assessing mineral extraction methods is critical for monitoring mineral concentration levels and ensuring oil quality. This study describes a new analytical method for the determination of cadmium (Cd), chromium (Cr), and lead (Pb) in edible sunflower oil using emulsion extraction followed by flame atomic absorption spectroscopy (FAAS). The method is based on the formation of a water-in-oil emulsion by mixing the oil sample with (1, 10 -2 and 10 -3 M nitric acid solution for Pb, Cr, and Cd respectively) incorporated with a certain amount of a surfactant Triton-X 100 for Pb and Cr, and Tween 80 for Cd. Once the emulsion was formed, it was broken by centrifuging the mixture at 4000 rpm for 5 minutes. This led to the extraction of metal ions into the aqueous phase which was collected, and introduced to FAAS for metal analysis. Neither an organic solvent was used nor an additional dilution was performed prior to the metal analysis. Various parameters that may affect the extraction efficiency of the target metals were evaluated and optimized. The detection limits were 20.0 μg/kg for lead, 4.0 μg/kg for chromium, and 0.2 μg/kg for cadmium. The standard addition method was used for the construction of the calibration curve to mitigate the potential interferences caused by the sample matrix. The findings confirmed that the proposed sample preparation method combined with FAAS provides a simple and reliable analytical method for the measurement of lead, chromium, and cadmium in edible oils.

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An eco-friendly and sensitive deep eutectic solvent-based liquid-phase microextraction procedure for extraction preconcentration of Pb (II) ions

2023

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Electrochemical preconcentration coupled with spectroscopic techniques for trace lead analysis in olive oils

Cited by 15 publications

References 33 publications

Schiff base functionalized silica gel for simultaneous separation and preconcentration of Cu(II), Ni(II), and Cd(II) in pharmaceuticals and water samples

Schiff base functionalized silica gel for simultaneous separation and preconcentration of Cu(II), Ni(II), and Cd(II) in pharmaceuticals and water samples

Development Method for The Determination of Cr, Cd And Pb in Edible Sunflower Oil Using Emulsion Extraction-faas

An eco-friendly and sensitive deep eutectic solvent-based liquid-phase microextraction procedure for extraction preconcentration of Pb (II) ions

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