Metal contaminants in rice from Cuba analyzed by ICP-MS, ICP-AES and CVAAS

Fernández, Zahily Herrero; Álvarez, J. R. Estévez; Alvárez, A.; Ugarte, Olegário Muñiz; González, Iván Pupo; González, Maydel Rodríguez; Júnior, José Araújo dos Santos; Bezerra, Mariana Brayner Cavalcanti Freire; Santos, Otávio Pereira Dos

doi:10.1080/19393210.2020.1870576

Cited by 22 publications

(2 citation statements)

References 22 publications

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“…2,3 The World Health Organization (WHO) has established a permissible concentration for zinc(II) in water of 3.0 mg L −1 , while for cadmium(II), it ranges between 0.004 and 0.01 mg L −1 . 4−6 Classical methods to detect and quantify HMs are fluorescence, 7 atomic absorption spectroscopy (AAS), 8,9 atomic fluorescence spectrometry (AFM), 10 inductively coupled plasma for atomic emission spectroscopy (ICP-AES), 11 optical emission spectroscopy (ICP-OES) 12 and mass spectroscopy (ICP-MS). 13,14 However, many of them require large sample volumes and sophisticated equipment and are also associated with complicated sample treatments and electrical overconsumption.…”

Section: Introductionmentioning

confidence: 99%

Square-Wave Voltammetric Detection of Zn(II) and Cd(II) with a Graphite/Carbon Paste Electrode Decorated with 2-Hydroxy-1,4-naphthoquinone

Carhuayal-Alvarez,

Ascencio-Flores,

Quiroz-Aguinaga

et al. 2023

ACS EST Water

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The concentration of heavy metals (HMs) in rivers continues to increase beyond regional background values, thereby impacting human health and disrupting ecological balance. In this context, an electrochemical sensing device to detect HM ions Zn(II) and Cd(II) in river waters is herein reported. It consists of graphite (G) decorated with 2-hydroxy-1,4-naphthoquinone (HNFQ) incorporated in a carbon paste electrode (CPE), and the G surface modification with HNFQ was characterized by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and chronocoulometry (CC). The electroanalytical behavior and detection of Zn(II) and Cd(II) were evaluated by square-wave voltammetry (SWV) and CV. The developed sensor exhibits excellent stability, reproducibility, repeatability, and selectivity in the presence of interferents. The optimal G/HNFQ-CPE sensitivity is reflected by the limits of detection (LOD, 0.28 ± 0.02 μmol L −1 for Zn and 0.21 ± 0.03 μmol L −1 for Cd), limits of quantification (LOQ, 0.95 ± 0.09 μmol L −1 for Zn and 0.70 ± 0.11 μmol L −1 for Cd), and linear working range (0.47−93.8 μmol L −1 ). DFT calculations were performed to obtain molecular insights into the electrode/ electrolyte solution interface. Finally, the sensor was validated using the atomic absorption technique, which places G/HNFQ-CPE as a promising electrode for Zn(II) and Cd(II) SWV detection.

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Section: Introductionmentioning

confidence: 99%

Square-Wave Voltammetric Detection of Zn(II) and Cd(II) with a Graphite/Carbon Paste Electrode Decorated with 2-Hydroxy-1,4-naphthoquinone

Carhuayal-Alvarez,

Ascencio-Flores,

Quiroz-Aguinaga

et al. 2023

ACS EST Water

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“…Therefore, the monitoring of mercury in water and food is crucial. There are various methods used for the detection of Hg 2+ , including atomic absorption spectroscopy (AAS) [4,5], atomic fluorescence spectrometry (AFS) [6], inductively coupled plasma mass spectrometry (ICP-MS) [7], surface-enhanced Raman spectroscopy (SERS) [8], etc. However, these methods need professional operation, a special testing machine and relatively tedious steps.…”

Section: Introductionmentioning

confidence: 99%

A Simple and Rapid “Signal On” Fluorescent Sensor for Detecting Mercury (II) Based on the Molecular Beacon Aptamer

Wang

Chi

Zhao

et al. 2022

Foods

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Biosensors for mercury (II) (Hg2+) with high sensitivity are urgently required for food safety, ecosystem protection and disease prevention. In this study, a simple and fast detection method of Hg2+ based on the molecular beacon aptamer was established, according to the principle that Hg2+ could change the structure of the molecular beacon aptamer, resulting in the changed fluorescence intensity. All of the detection conditions were optimized. It was found that an optimal molecular beacon aptamer MB3 showed the optimal response signal in the optimized reaction environment, which was 0.08 μmol/L MB3, 50 mmol/L tris buffer (40 mmol/L NaCl, 10 mmol/L MgCl2, pH 8.1), and a 10 min reaction. Under the optimal detection conditions, the molecular beacon aptamer sensor showed a linear response to Hg2+ concentration within a range from 0.4 to 10 μmol/L and with a detection limit of 0.2254 μmol/L and a precision of 4.9%. The recovery rates of Hg2+ in water samples ranged from 95.00% to 99.25%. The method was convenient and rapid, which could realize the rapid detection of mercury ions in water samples.

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Label-free electrochemical aptasensor for ultrasensitive lead ion detection based on flower-like AuNPs@MoS2 and core–shell Pt@Pd bimetallic nanoparticles

Hao,

Liu,

Zheng

et al. 2024

Microchim Acta

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Metal contaminants in rice from Cuba analyzed by ICP-MS, ICP-AES and CVAAS

Cited by 22 publications

References 22 publications

Square-Wave Voltammetric Detection of Zn(II) and Cd(II) with a Graphite/Carbon Paste Electrode Decorated with 2-Hydroxy-1,4-naphthoquinone

Square-Wave Voltammetric Detection of Zn(II) and Cd(II) with a Graphite/Carbon Paste Electrode Decorated with 2-Hydroxy-1,4-naphthoquinone

A Simple and Rapid “Signal On” Fluorescent Sensor for Detecting Mercury (II) Based on the Molecular Beacon Aptamer

Label-free electrochemical aptasensor for ultrasensitive lead ion detection based on flower-like AuNPs@MoS2 and core–shell Pt@Pd bimetallic nanoparticles

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