Highly selective simultaneous determination of Cu(<scp>ii</scp>), Co(<scp>ii</scp>), Ni(<scp>ii</scp>), Hg(<scp>ii</scp>), and Mn(<scp>ii</scp>) in water samples using microfluidic paper-based analytical devices

Kamnoet, Pornphimon; Aeungmaitrepirom, Wanlapa; Menger, Ruth F.; Henry, Charles S.

doi:10.1039/d0an02200d

Cited by 48 publications

(44 citation statements)

References 51 publications

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“…On the other hand, some applications as the analytical photometric determination of traces of Ni, Pd or Pt [32,35,52] or their use in (medical) coordination chemistry [52][53][54][55][56] seem to make use of the properties of the molecular units and UV-vis absorption spectra of [Ni(Hdmg)2] in solution have been discussed as to stem from monomolecular units [15,16,46,57]. However, other spectroscopic data from species in solution is not reported and the frequently reported virtual insolubility of the materials sheds doubts on the question of the monomolecular species cause the absorptions of [Ni(Hdmg)2] [15,16,52,57] and are responsible for the biological effects of [Ni(Hdmg)2] [53] and [Pt(Hdmg)2] [54].…”

Section: Introductionmentioning

confidence: 99%

“…Pressure experiments have shown that the M ... M interactions account also for the compressibility of these structures and the pressure-dependent changes of colour and electronic properties [3,4,8,12,[26][27][28][29][30][31]. These virtually insoluble metal ... metal stacked solids are the basis for applications of the three compounds [M(Hdmg) 2 ] (M = Pt, Pd, Ni) for the extraction or removal of these elements [32][33][34][35], as components of solid catalysts [36][37][38][39][40], as solid but easily evaporable precursors [37][38][39][40][41][42][43][44][45][46][47], and in optical devices (e.g., pressure calibrants/indicators) [3,4,12,[26][27][28][29][30][31][48][49][50][51].…”

Section: Introductionmentioning

confidence: 99%

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DFT Investigation of the Molecular Properties of the Dimethylglyoximato Complexes [M(Hdmg)2] (M = Ni, Pd, Pt)

Niazi

Klein

2021

Inorganics

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Important applications of the NiII, PdII and PtII complexes [M(Hdmg)2] (H2dmg = dimethylglyoxime) stem from their metal...metal stacked virtually insoluble aggregates. Given the virtual insolubility of the materials, we postulated that the rare reports on dissolved species in solution do not represent monomolecular species but oligomers. We thus studied the structural and spectral properties of the monomolecular entities of these compounds using density functional theory (DFT) and time-dependent DFT computations in dimethyl sulfoxide (DMSO) as a solvent. The molecular geometries, IR and UV-vis spectra, and frontier orbitals properties were computed using LANL2DZ ecp and def2TZVP as basis sets and M06-2X as the functional. The results are compared with the available experimental and other calculated data. The optimised molecular geometries proved the asymmetric character of the two formed O–H…O bonds which connect the two Hdmg‒ ligands in the completely planar molecules. Calculated UV-vis spectra revealed the presence of three absorptions in the range 180 to 350 nm that are red-shifted along the series Ni–Pd–Pt. They were assigned to essentially ligand-centred π−π* transitions in part with metal(d) to ligand(π*) charge transfer (MLCT) contributions. The notorious d‒p transitions dominating the colour and electronics of the compounds in the solid-state and oligomeric stacks are negligible in our monomolecular models strongly supporting the idea that the previously reported spectroscopic observations or biological effects in solutions are not due to monomolecular complexes but rather to oligomeric dissolved species.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

DFT Investigation of the Molecular Properties of the Dimethylglyoximato Complexes [M(Hdmg)2] (M = Ni, Pd, Pt)

Niazi

Klein

2021

Inorganics

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“…and pond samples were analysed and gave good accuracy and agreement with an ICP-OES method [83]. Grasianto et al recently reported the use of bathophenanthroline nanocrystals loaded onto a μPAD.…”

Section: Fluorescence Detectionmentioning

confidence: 93%

“…The linear ranges were 0.32-63.55 mg L −1 Cu(II), 0.59-4.71 mg L −1 Co(II), 5.87-352.16 mg L −1 Ni(II), 0.20-12.04 mg L −1 Hg(II), and 0.11-0.55 mg L −1 Mn(II). Samples of drinking water and pond samples were analysed and gave good accuracy and agreement with an ICP-OES method [83]. Grasianto et al recently reported the use of bathophenanthroline nanocrystals loaded onto a µPAD.…”

Section: Absorbance Based Detectionmentioning

confidence: 98%

A Review of Microfluidic Detection Strategies for Heavy Metals in Water

Lace

Cleary

2021

Chemosensors

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Heavy metal pollution of water has become a global issue and is especially problematic in some developing countries. Heavy metals are toxic to living organisms, even at very low concentrations. Therefore, effective and reliable heavy metal detection in environmental water is very important. Current laboratory-based methods used for analysis of heavy metals in water require sophisticated instrumentation and highly trained technicians, making them unsuitable for routine heavy metal monitoring in the environment. Consequently, there is a growing demand for autonomous detection systems that could perform in situ or point-of-use measurements. Microfluidic detection systems, which are defined by their small size, have many characteristics that make them suitable for environmental analysis. Some of these advantages include portability, high sample throughput, reduced reagent consumption and waste generation, and reduced production cost. This review focusses on developments in the application of microfluidic detection systems to heavy metal detection in water. Microfluidic detection strategies based on optical techniques, electrochemical techniques, and quartz crystal microbalance are discussed.

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“…There is a pressing need to develop alternative and inexpensive methods that permit on-site detection of metal ions. More recently, a microfluidic paper-based analytical device (mPAD) has been designed for quantifying metals in water, and the detection limit for copper and zinc can be as low as 0.1 ppm (8,9). With the advancement of synthetic biology, there is an emerging interest in developing field-deployable "biosensors" for water quality monitoring (10).…”

Section: Introductionmentioning

confidence: 99%

High-performance Saccharomyces cerevisiae-based biosensor for heavy metal detection

Fan

Zhang

2021

Preprint

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Heavy metals, i.e., Cu(II), are harmful to the environment. There is an increasing demand to develop inexpensive detection methods for heavy metals. Here, we developed a yeast biosensor with reduced-noise and improved signal output for potential on-site copper ion detection. The copper-sensing circuit was achieved by employing a secondary genetic layer to control the galactose-inducible (GAL) system in Saccharomyces cerevisiae. The reciprocal control of the Gal4 activator and Gal80 repressor under copper-responsive promoters resulted in a low-noise and ultrasensitive yeast biosensor for the copper ion detection. Furthermore, we developed a betaxanthin-based colorimetric assay, as well as 2-phenylethanol and styrene-based olfactory outputs for the copper ion detection. Notably, our engineered yeast sensor confers a narrow range switch-like behavior, which can give a “yes/no” response when coupled with betaxanthin-based visual phenotype. Taken together, we envision that the design principle established here might be applicable for developing other sensing systems for various chemical detections.

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Highly selective simultaneous determination of Cu(ii), Co(ii), Ni(ii), Hg(ii), and Mn(ii) in water samples using microfluidic paper-based analytical devices

Abstract: A new paper-based analytical device design was fabricated by wax printing method for simultaneous Cu(II), Co(II), Ni(II), Hg(II), and Mn(II) determination. Colorimetry was used to quantify the heavy metal ions,...

Cited by 48 publications

References 51 publications

DFT Investigation of the Molecular Properties of the Dimethylglyoximato Complexes [M(Hdmg)2] (M = Ni, Pd, Pt)

DFT Investigation of the Molecular Properties of the Dimethylglyoximato Complexes [M(Hdmg)2] (M = Ni, Pd, Pt)

A Review of Microfluidic Detection Strategies for Heavy Metals in Water

High-performance Saccharomyces cerevisiae-based biosensor for heavy metal detection

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