DNA-based electrochemical determination of mercury(II) by exploiting the catalytic formation of gold amalgam and of silver nanoparticles

Tang, Juan; Huang, Yapei; Zhang, Cengceng; Liu, Huiqiong; Tang, Dianping

doi:10.1007/s00604-016-1813-8

Cited by 22 publications

(8 citation statements)

References 35 publications

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“…This value was significantly lower than the maximum allowable mercury concentration (10.0 nM) by USEPA in drinking water [17]. The proposed method [30,[37][38][39][40][41]43], electrochemical sensor [42], spectrophotometric [44,48], colorimetry [45,49], chemiluminescence [46], single-crystal X-ray diffraction [47], electrochemiluminescence biosensor [50], X-ray fluorescence (XRF) [51], differential pulse voltammetry [36,52], ICP-OES [21], electrochemical [50] and X-ray photoelectron spectroscopy (XPS) [53], in terms of LOD and LOQ (Table 4).…”

Section: Respectivelymentioning

confidence: 77%

“…Recently, several molecular probe-based sensors using organic chromophores, quantum dots (QDs), small fluorescent organic molecules, proteins, antibodies and conjugated polymers coupled with several spectrometric and electrochemical techniques are reported for mercury(II) determination [36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53]. Some of these methods suffere from solubility issues, low stability, lower sensitivity and selectivity, complicated synthesis procedures and environmentally unfriendliness to monitor mercury(II) in biological and environmental samples.…”

Section: Introductionmentioning

confidence: 99%

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A Simple and Highly Structured Procaine Hydrochloride as Fluorescent Quenching Chemosensor for Trace Determination of Mercury Species in Water

Al‐Eryani¹,

Ahmad²,

Saigl³

et al. 2018

Trace Elements - Human Health and Environment

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An ultrasensitive, simple and highly selective spectrofluorometric strategy for quantifying traces of mercury(II) in environmental water has been established using the fluorescent probe procaine hydrochloride (PQ + .Cl −). The procedure was based upon the formation of the ternary ion associate complex [(PQ +) 2 .(HgI 4) 2− ] between PQ + .Cl − and mercury(II) in iodide media at pH 9.0-10.0 with its subsequent extraction onto dichloromethane accompanied by a change in fluorescence intensity at λ ex/em = 268/333 nm. The developed strategy exhibited a linear range of 1-114 μg L −1 with lower limit of detection (LOD) and quantification (LOQ) of mercury(II) 1.3 and 3.98 nM, respectively. Intra and inter-day laboratory accuracy and precision for trace analysis of mercury(II) in water were performed. Complexed mercury(II) in environmental water, chemical speciation and successful literature comparison was performed. The proposed system offered excellent selectivity towards mercury(II) ions examined in the presence of competent ions in excess, relevant to real water samples. The method was applied for analysis of mercury(II) in tap water samples. Statistical comparison (Student's t and F tests) of the proposed method with the reference ICP-OES method revealed no significant differences in the accuracy and precision.

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Section: Respectivelymentioning

confidence: 77%

Section: Introductionmentioning

confidence: 99%

A Simple and Highly Structured Procaine Hydrochloride as Fluorescent Quenching Chemosensor for Trace Determination of Mercury Species in Water

Al‐Eryani¹,

Ahmad²,

Saigl³

et al. 2018

Trace Elements - Human Health and Environment

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show abstract

“…A glassy carbon electrode (GCE) modified by electrodeposited silver nanoparticles AgNPs as an electrochemical nanoaptasensor was used to determine trinitrotoluene [ 50 ]. Mercury ions were detected by silver nanoparticles as signal reporter selectively electrodeposited on glassy carbon electrode modified with DNA-based AuHg amalgam [ 51 ]. All these modifications were done in order to enhance the electrode sensitivity and others lead to high electrocatalytic activity.…”

Section: Resultsmentioning

confidence: 99%

Electrodeposition of silver onto carbon graphite and their catalysis properties toward thiamethoxam reduction: application in food and beverage samples

Ajermoun

Lahrich

Farahi

et al. 2020

Heliyon

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The purpose of this paper is the electrodeposition of silver particles on graphite electrode (Ag@GrCE) using chronoamperometry and the use of this electrode for the determination of thiamethoxam. The electrode was prepared by chronoamperometry and characterized by X-Ray diffraction (XRD), fourier transform infrared spectroscopy (FT-IR), EDX analysis and electrochemical impedance spectroscopy. The obtained electrode exhibits excellent electrocatalytic activity toward thiamethoxam reduction. The voltammetric response was linear as function of TXM concentration with a limit of detection around to 1.92 × 10 −6 mol L −1 . The proposed electrode was successfully used to analyze thiamethoxam residue in some food samples including orange and tomato juices.

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“…The selective binding of DNA bases to Hg(II) and Pb(II) was also used for the development of procedures based on responses due to the cleavage or the hybridization of DNA strands. These reactions promote the (dis)assembly of DNA strands and aptamers labeled with a chemical mediator, such as methylene blue, ethyl green, ferrocene, and gold nanoparticles [9,36,37,41,137,159,175] for bioelectrochemical sensors. Competitive reactions between analyte and chemical mediators with immobilized oligonucleotides were also reported [71,140,153,160,162,164,165].…”

Section: Affinitymentioning

confidence: 99%

“…The amino polymerization method has also been employed for the modification of GCE without a metallic coating. In this case, carboxyl groups were generated on the carbon surface after electrochemical oxidation to enable the polymerization reaction [91,137]. Alternatively, the modification of an electrode was carried out with carboxylated carbon nanotubes (CNT), which was applied for the immobilization of glucose oxidase, aiming at Cd(II) determination [69].…”

Section: Electrochemical Sensorsmentioning

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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DNA-based electrochemical determination of mercury(II) by exploiting the catalytic formation of gold amalgam and of silver nanoparticles

Cited by 22 publications

References 35 publications

A Simple and Highly Structured Procaine Hydrochloride as Fluorescent Quenching Chemosensor for Trace Determination of Mercury Species in Water

A Simple and Highly Structured Procaine Hydrochloride as Fluorescent Quenching Chemosensor for Trace Determination of Mercury Species in Water

Electrodeposition of silver onto carbon graphite and their catalysis properties toward thiamethoxam reduction: application in food and beverage samples

An overview of Structured Biosensors for Metal Ions Determination

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