An electrochemical sensor for attomolar determination of mercury(II) using DNA/poly-L-methionine-gold nanoparticles/pencil graphite electrode

Hasanjani, Hamid Reza Akbari; Zarei, Kobra

doi:10.1016/j.bios.2018.12.039

Cited by 86 publications

(30 citation statements)

References 38 publications

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“…The ECL decreased as the concentration of Hg 2+ in solution increased in the range from 0.10 to 10 pM with a LOD of 0.040 pM. The possibility to determine the target ion in the attomolar range of concentrations by a DNA modified electrochemical sensor was also reported [73]. To monitor Hg 2+ in this concentration range, Hasanjani et al employed a pencil graphite electrode (PEG) modified with DNA/poly L-methionine gold nanoparticles, detecting Hg 2+ via square wave anodic stripping voltammetry (SWASV).…”

Section: Mercurymentioning

confidence: 93%

Bio- and Biomimetic Receptors for Electrochemical Sensing of Heavy Metal Ions

Stortini

Baldo

Moro

et al. 2020

Sensors

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Heavy metals ions (HMI), if not properly handled, used and disposed, are a hazard for the ecosystem and pose serious risks for human health. They are counted among the most common environmental pollutants, mainly originating from anthropogenic sources, such as agricultural, industrial and/or domestic effluents, atmospheric emissions, etc. To face this issue, it is necessary not only to determine the origin, distribution and the concentration of HMI but also to rapidly (possibly in real-time) monitor their concentration levels in situ. Therefore, portable, low-cost and high performing analytical tools are urgently needed. Even though in the last decades many analytical tools and methodologies have been designed to this aim, there are still several open challenges. Compared with the traditional analytical techniques, such as atomic absorption/emission spectroscopy, inductively coupled plasma mass spectrometry and/or high-performance liquid chromatography coupled with electrochemical or UV–VIS detectors, bio- and biomimetic electrochemical sensors provide high sensitivity, selectivity and rapid responses within portable and user-friendly devices. In this review, the advances in HMI sensing in the last five years (2016–2020) are addressed. Key examples of bio and biomimetic electrochemical, impedimetric and electrochemiluminescence-based sensors for Hg2+, Cu2+, Pb2+, Cd2+, Cr6+, Zn2+ and Tl+ are described and discussed.

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Section: Mercurymentioning

confidence: 93%

Bio- and Biomimetic Receptors for Electrochemical Sensing of Heavy Metal Ions

Stortini

Baldo

Moro

et al. 2020

Sensors

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“…The association of this strategy with electrochemical transducers significantly lowered the detection limits, especially when stripping voltammetry was employed for the determination of elements [17,46,47]. The coordination of metal ions with proteins [74], aminoacids [17,[75][76][77][78][79], synthetized peptides [70], hormones (melatonine [80] and oxytocin [7]), DNA strands [17,46,[81][82][83], and a neurotransmitter (neurokinin B [38]) were exploited to achieve detection limits as low as 0.80 ag L −1 [81]. The selected articles regarding this mechanism are displayed in Table 1.…”

Section: Metal Ion Accumulationmentioning

confidence: 99%

An overview of Structured Biosensors for Metal Ions Determination

et al. 2021

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The determination of metal ions is important for nutritional and toxicological assessment. Atomic spectrometric techniques are highly efficient for the determination of these species, but the high costs of acquisition and maintenance hinder the application of these techniques. Inexpensive alternatives for metallic element determination are based on dedicated biosensors. These devices mimic biological systems and convert biochemical processes into physical outputs and can be used for the sensitive and selective determination of chemical species such as cations. In this work, an overview of the proposed biosensors for metal ions determination was carried out considering the last 15 years of publications. Statistical data on the applications, response mechanisms, instrumentation designs, applications of nanomaterials, and multielement analysis are herein discussed.

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“…Several electrodes can be used to determine mercury by stripping voltammetry, for instance, glassy carbon electrodes, gold electrodes [25,27,31,37], modified electrode [29,35,[38][39][40], and screen-printed carbon electrodes [41].…”

Section: Introductionmentioning

confidence: 99%

Determination of Total Mercury in Solid Samples by Anodic Stripping Voltammetry

Nguyen

Luu

et al. 2021

Journal of Chemistry

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The anodic stripping voltammetry (ASV) was investigated to determine total mercury in solid samples using a gold electrode. The mercury was deposited on the gold electrode in a preconcentration step. The oxidation peak of mercury was irreversible. The optimal conditions of the procedure were found to be as follows: 0.05 mol L−1 HCl solution, deposition potential −0.5 V vs. Ag/AgCl/KCls, deposition time 40 s, and sweep rate 0.04 V s−1. Under the optimal conditions, the peak current showed a linear dependence on Hg2+ concentration in the range from 0.01 to 0.1 mg l−1. The detection limit and quantification limit were 4.28 µg L−1 and 12.98 µg L−1, respectively. The mean recovery and relative standard deviation were 91.2% and 2.4% (n = 9). The procedure was successfully applied for determining total mercury in samples collected from Hanoi light bulb warehouse—The Rang Dong Light Source and Vacuum Flask JSC. The results were compared with cold vapor atomic absorption spectrometry (CV-AAS).

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An electrochemical sensor for attomolar determination of mercury(II) using DNA/poly-L-methionine-gold nanoparticles/pencil graphite electrode

Cited by 86 publications

References 38 publications

Bio- and Biomimetic Receptors for Electrochemical Sensing of Heavy Metal Ions

Bio- and Biomimetic Receptors for Electrochemical Sensing of Heavy Metal Ions

An overview of Structured Biosensors for Metal Ions Determination

Determination of Total Mercury in Solid Samples by Anodic Stripping Voltammetry

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