Colorimetric detection of Cr (VI) based on the leaching of gold nanoparticles using a paper-based sensor

Guo, Jianfeng; Huo, Dehong; Yang, Mei; Hou, Changjun; Li, Junjie; Fa, Huanbao; Luo, Huibo; Yang, Ping

doi:10.1016/j.talanta.2016.09.032

Cited by 98 publications

(33 citation statements)

References 42 publications

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“…Enzymatic activity of the platinum nanoparticles to turn the TMB to blue is inhibited by the Hg 2+ ions in this case [87]. Many such PAD based naked eye detection of HMIs can be found in literature [88][89][90]. Paper based electrochemical sensors (PESs) are coined as they inherit the simplicity and advantages of the PADs with better sensitivity.…”

Section: Paper/stripmentioning

confidence: 99%

Electrochemical and Optical Methods for the Quantification of Lead and Other Heavy Metal Ions in Liquid Samples

Devaramani¹,

Banuprakash²,

Doreswamy³

et al. 2021

Heavy Metals - Their Environmental Impacts and Mitigation

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Minerals and elementary compounds of heavy metals are part of the ecosystem. Because of their high density and property to accumulate in stable forms, they are considered to be highly toxic to animals, plants and humans. Continuous mining activities and industrial effluents are the major sources which are adding toxic heavy metal ions into ecosystem and biota. Hence it is of utmost importance to quantify the levels of heavy metal ions in environmental and biological samples. On the other hand, it is equally important to remove the heavy metal ions and their compounds from the environmental and biological samples. That facilitates the environmental samples to be fit for using, consumption. In this regard, promising quantification methods such as electrochemical, spectrophotometric, naked eye sensing, test strips for spot analysis of heavy metal ions are considered for discussion. The main objective of this chapter is to give the overview of the most practiced quantification approaches available in the literature. Please note that reader cannot find the pin to pin publications regarding the same and that is not the aim of this book chapter.

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Section: Paper/stripmentioning

confidence: 99%

Electrochemical and Optical Methods for the Quantification of Lead and Other Heavy Metal Ions in Liquid Samples

Devaramani¹,

Banuprakash²,

Doreswamy³

et al. 2021

Heavy Metals - Their Environmental Impacts and Mitigation

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“…10d confirms the existence of Ag, W, O, and Cr after sensing Cr 6+ in the gelatin capsule. The sensitivity of this colorimetric sensor has been compared to those of earlier studies using nanoparticles sensors as shown in Table 1 which shows a superior limit of detection for the proposed sensor [43][44][45][46][47] .…”

Section: Fig 5: (A) Saed Pattern Of Agf/ag 2 Wo 4 Nanocomposite (B) mentioning

confidence: 99%

Untitled

2019

IJPSR

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The present work deals with a novel synthesis of AgF/Ag 2 WO 4 nanocomposite by co-precipitation method. The morphology and size of the synthesized AgF/Ag 2 WO 4 nanocomposite were confirmed by Ultraviolet-Visible (UV-Vis) spectroscopy, Fourier Transform-Infrared (FT-IR) spectroscopy, Transition Electron Microscopy (TEM) and X-Ray Diffraction (XRD) analyses. The performance of the nanocomposite was successfully evaluated for Cr 6+ detection in a gelatin capsule, which indicated that this convenient and sensitive material offered great promise for onsite environmental monitoring of Cr 6+ . Control experiments with the addition of over 10 other metal ions (Na + , K + , Mg 2+ , Fe 2+ , Hg 2+ , Ca 2+ , Cu 2+ , Ni 2+ , Mn 2+ , Zn 2+ ) did not result in a distinct change in the colour or in the spectrum of the suspension which indicated that these ions did not interfere in the colorimetric determination of Cr 6+ in gelatin capsule. The detection concentration of Cr (VI) ranged from 0.5 mg to 1.0 mg, and the detection limit was 2 nM. INTRODUCTION:High soluble and toxic content with the carcinogenic effect of hexavalent chromium Cr 6+ has been consistently found to be associated with an elevated incidence of respiratory cancers and other adverse health consequences. Chromium commonly exists in nature with two stable oxidation states, Cr 3+ and Cr 6+ , whereas Cr 6+ is highly water soluble and toxic, Cr (III) is much less soluble in water and less toxic to humans in the absence of complexing ligands 1-3 . Many industries produce this carcinogenic pollutant including leather tanning, cement, textile, printers and stainless steel welding 4-7 .

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“…In addition to traditional instrumental analysis methods, several strategies have been developed for quantitative determination of Cr(VI) using nanomaterials based on phenomena such as the inner lter effect (IFE), [37][38][39][40][41][42] electrochemical detection, 43,44 and absorbance detection. [45][46][47][48] Of these, the IFE mechanism is the most widely exploited owing to its low detection limit and comparative freedom from matrix effects. 49 Herein, we propose a new synthetic strategy to synthesis biligand Cu NCs and a discussion of the relationship between the two ligands and the properties of the Cu NCs.…”

Section: Introductionmentioning

confidence: 99%

Fluorescence-tunable copper nanoclusters and their application in hexavalent chromium sensing

Lin

Chiu

2019

RSC Adv.

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Colorimetric detection of Cr (VI) based on the leaching of gold nanoparticles using a paper-based sensor

Cited by 98 publications

References 42 publications

Electrochemical and Optical Methods for the Quantification of Lead and Other Heavy Metal Ions in Liquid Samples

Electrochemical and Optical Methods for the Quantification of Lead and Other Heavy Metal Ions in Liquid Samples

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Fluorescence-tunable copper nanoclusters and their application in hexavalent chromium sensing

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