On-line preconcentration and determination of lead and cadmium by sequential injection/anodic stripping voltammetry

Ninwong, Benjawan; Chuanuwatanakul, Suchada; Chailapakul, Orawon; Dungchai, Wijitar; Motomizu, Shoji

doi:10.1016/j.talanta.2012.03.057

Cited by 45 publications

(24 citation statements)

References 20 publications

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“…Typically, the Pb level in unpolluted water samples is at 31 or below 32 the single ppb level, or even undetectable when the LOD is as low as 0.01 ppb. 33 …”

Section: Resultsmentioning

confidence: 99%

Determination of Lead with a Copper-Based Electrochemical Sensor

Kang¹,

Pei²,

Rusinek³

et al. 2017

Anal. Chem.

115

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This work demonstrates determination of lead (Pb) in surface water samples using a low-cost copper (Cu)-based electrochemical sensor. Heavy metals require careful monitoring due to their toxicity, yet current methods are too complex or bulky for point-of-care (POC) use. Electrochemistry offers a convenient alternative for metal determination, but the traditional electrodes, such as carbon or gold/platinum, are costly and difficult to microfabricate. Our Cu-based sensor features a low-cost electrode material – copper – that offers simple fabrication and competitive performance in electrochemical detection. For anodic stripping voltammetry (ASV) of Pb, our sensor shows 21 nM (4.4 ppb) limit of detection, resistance to interfering metals such as cadmium (Cd) and zinc (Zn), and stable response in natural water samples with minimum sample pretreatment. These results suggest this electrochemical sensor is suitable for environmental and potentially biological applications, where accurate and rapid, yet inexpensive on-site monitoring is necessary.

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“…Typically, the Pb level in unpolluted water samples is at 31 or below 32 the single ppb level, or even undetectable when the LOD is as low as 0.01 ppb. 33 …”

Section: Resultsmentioning

confidence: 99%

Determination of Lead with a Copper-Based Electrochemical Sensor

Kang¹,

Pei²,

Rusinek³

et al. 2017

Anal. Chem.

115

View full text Add to dashboard Cite

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“…For the determination of trace levels of environmental pollutants, on-line preconcentration technique with solid-phase extraction process integrated with the SIA system was reported. [44][45][46] In this paper, we propose the SIA system with on-line preconcentration technique for the determination of ASs using our microfluidic chip with an embedded AS-ISE as a detector.…”

Section: ¹1mentioning

confidence: 99%

Sequential Injection Analysis of Anionic Surfactants Using On-line Preconcentration Technique and a Microfluidic Polymer Chip with an Embedded Ion-Selective Electrode as a Detector

Masadome

Arai

2018

Electrochemistry

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A sequential injection analysis (SIA) system with on-line preconcentration technique using a microfluidic chip with an embedded anionic surfactant ion-selective electrode (AS-ISE) as a detector, was developed for the determination of anionic surfactants. Under the SIA system with no on-line preconcentration technique, the AS-ISE in the SIA system showed a linear relationship between peak heights and logarithmic concentrations of AS ion such as dodecylbenzene sulfonate (DBS) ion with a Nernstian slope of 60.4 mV decade −1 in a concentration range from 3.0 × 10 −6 to 1.0 × 10 −3 mol dm. For the determination of trace levels of ASs, on-line preconcentration technique with solid-phase extraction process was incorporated into the SIA system. By using the on-line preconcentration technique in the SIA system, DBS ion in a concentration range from 1.0 × 10 −7 to 3.0 × 10 −6 mol dm −3 was successfully determined. The recovery for DBS ion added to river water samples was ca. 91-97% using on-line preconcentration technique in the SIA system. The result shows that the present SIA system with the on-line preconcentration technique can be applicable to the determination of the level of AS ion in river and tap water samples.

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“…Herein, various nanomaterials including nanoparticles (NPs), carbon nanotubes (CNTs) and graphene have been employed to modify the electrodes in order to increase the electrochemical active surface area of the device and to offer a synergic effect for enhancing its sensitivity [14,17]. They are commonly integrated on the surface of commercial electrodes aiming at developing different sensor architectures.…”

Section: Bi-based Electrochemical Devicesmentioning

confidence: 99%

“…For instance, Bi-based miniaturized devices hold great promise for in-field Pb(II) and Cd(II) analysis, as demonstrated by Neagu et al [37], who developed a set-up in which Lemna Minor L. aquatic plant was employed to purify wastewater and a Bi film plated SPCEs sensor was integrated to in-situ measure the efficiency of this plant in the removal of heavy metals. Ninwong et al [17] incorporated Bi-coated screen printed carbon nanotube electrodes in a sequential injection analysis system for the automated determination of Pb(II) and Cd(II) in drinking water, tap water and pond water samples.…”

Section: Bi-based Electrochemical Devicesmentioning

confidence: 99%

Electrochemical devices for the detection of priority pollutants listed in the EU water framework directive

Díaz‐González

Gutiérrez-Capitán

Niu

et al. 2016

TrAC Trends in Analytical Chemistry

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Monitoring chemical contamination in water is a must to guarantee the supply to the society of this more and more scarce prized asset. The European Union as well as other bodies have released reports and directives defining lists of substances whose detection in waters should be prioritized and posing limits to the maximum allowable concentrations that drinking water must have. The scientific community has been actively working on the development of analytical tools that could be applied in the detection of hazardous chemical species in waters. Here, an overview of electrochemical devices with the potential of being implemented to the monitoring of the forty five pollutants include in the list of priority substances set in the 2013 EU directive that could be grouped into heavy metals, pesticides, hydrocarbons, halogenated hydrocarbons and alkyl phenols, is given, aiming at showing their benefits and limitations in this scenario.

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On-line preconcentration and determination of lead and cadmium by sequential injection/anodic stripping voltammetry

Cited by 45 publications

References 20 publications

Determination of Lead with a Copper-Based Electrochemical Sensor

Determination of Lead with a Copper-Based Electrochemical Sensor

Sequential Injection Analysis of Anionic Surfactants Using On-line Preconcentration Technique and a Microfluidic Polymer Chip with an Embedded Ion-Selective Electrode as a Detector

Electrochemical devices for the detection of priority pollutants listed in the EU water framework directive

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