Trichloroacetic acid assisted synthesis of gold nanoparticles and its application in detection and estimation of pesticide

Barman, Gadadhar; Maiti, Swarnali; Laha, Jayasree Konar

doi:10.1186/2093-3371-4-3

Cited by 7 publications

(5 citation statements)

References 18 publications

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“…For instance, colloidal red colored AuNPs has an SPR peak at 520 nm which shifts to a longer wavelength (red shift) with increase in particle size and is characterized by appearance of blue colored solution [47]. According to Mie theory transformation of spherical shapes of particles to other geometry shapes may subject to SPR shift [48], i.e. when synthesized as nanorods.…”

Section: Synthesis or Modification Of Metal Nanoparticles Assaysmentioning

confidence: 99%

“…The color change during nanoparticle aggregation is highly dependent on their concentrations. Barman et al [48] used cetyltrimethyl ammonium bromide (CTAB) capped AuNPs as colorimetric assay for methyl parathion pesticide (0 to 500 ppm) by visualizing the color change after adding methyl parathion into 5 mL of synthesized AuNPs. The sol was heated for 5 min with stirring and the reddish violet color changed into yellow and the concentration of methyl parathion can be quantitatively estimated from the color change (red to yellow).…”

Section: Chemical (Non-enzymatic) Based Assaysmentioning

confidence: 99%

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A review on colorimetric methods for determination of organophosphate pesticides using gold and silver nanoparticles

et al. 2020

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This review (with 99 refs.) summarizes the progress that has been made in colorimetric (i.e. spectrophotometric) determination of organophosphate pesticides (OPPs) using gold and silver nanoparticles (NPs). Following an introduction into the field, a first large section covers the types and functions of organophosphate pesticides. Methods for colorimetric (spectrophotometric) measurements including RGB techniques are discussed next. A further section covers the characteristic features of gold and silver-based NPs. Syntheses and modifications of metal NPs are covered in section 5. This is followed by overviews on enzyme inhibition-based assays, aptamer-based assays and chemical (non-enzymatic) assays, and a discussion of specific features of colorimetric assays. Several Tables are presented that give an overview on the wealth of methods and materials. A concluding section addresses current challenges and discusses potential future trends and opportunities.

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Section: Synthesis or Modification Of Metal Nanoparticles Assaysmentioning

confidence: 99%

Section: Chemical (Non-enzymatic) Based Assaysmentioning

confidence: 99%

A review on colorimetric methods for determination of organophosphate pesticides using gold and silver nanoparticles

et al. 2020

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“…Likewise, heparin behaved as a reducing and stabilized ligand for the synthesis of the AuNPs. Barman et al synthesized highly stable AuNPs through trichloroacetic acid-triggered reduction of HAuCl 4 in the presence of cetyl-trimethylammonium bromide (CTAB) [ 91 ]. The formed CTAB-capped AuNPs kept dispersed for more than six months.…”

Section: Synthesis Of Aunps and Their Modificationmentioning

confidence: 99%

Functionalized gold nanoparticles for sensing of pesticides: A review

Tseng¹,

Hsieh²,

Chen³

et al. 2020

Journal of Food and Drug Analysis

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Pesticides are a family of non-biodegradable chemical compounds which widely used in agriculture to control pests and increase yield production. However, overuse or abuse of pesticides and their metabolites may cause potential toxicity for the environment as well as human health and all other living organisms, even at deficient concentrations. Consequently, the development of sensors for monitoring these compounds is significant. Recently, nanoparticles-based sensors have been extensively employed as a potential alternative or complementary analytical tool to conventional detection methods for pesticides. Among them, gold nanoparticles (AuNPs) owing to their unique optical properties have been developed as smart sensors with high selectivity, sensitivity, simplicity, and portability. These comprehensive reviews have summarized various studies performed based on different detection strategies, i.e., colorimetric, fluorescence, surface-enhanced Raman scattering, and electrochemical, using AuNPs as sensing probes for pesticide analysis in various matrices. Additionally, the current challenges and future trends for developing novel AuNPs-based sensors for the detection of pesticides are also discussed.

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“…In recent work, Barman et al have also reported that the phosphorothioate group of the methyl parathion forms a bond with gold nanoparticles. 33 This interaction between MP and the embedded GNP and the enhanced surface area of the GNP-Gel beads could be the reasons for the increase in the sorption capacity of the GNP-Gel beads.…”

Section: Sorption Studiesmentioning

confidence: 99%

Gold nanoparticle chitosan composite hydrogel beads show efficient removal of methyl parathion from waste water

et al. 2014

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Removal of pesticides from waste water is extremely important for the avoidance of serious health risks. We report an environmentally benign synthetic approach to prepare sorbent-hydrogel composite beads, composed of gold nanoparticles (GNP) embedded in a cross-linked biocompatible chitosan polymer matrix, for removal of the pesticide methyl parathion (MP). The equilibrium sorption and kinetic data, at different initial MP concentrations, are analysed using various sorption isotherm and kinetic models. It is observed that the sorption process can be best described by the Langmuir isotherm model and that pseudo second-order kinetics are followed throughout the studied concentration range. The monolayer capacity of the beads with and without the GNP composite are determined to be 58 mmol g À1 and 11 mmol g À1 , respectively, suggesting the potential usefulness of the former for the removal of MP. The results show that the synthesized sorbent has good potential for pesticide removal.

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Trichloroacetic acid assisted synthesis of gold nanoparticles and its application in detection and estimation of pesticide

Cited by 7 publications

References 18 publications

A review on colorimetric methods for determination of organophosphate pesticides using gold and silver nanoparticles

A review on colorimetric methods for determination of organophosphate pesticides using gold and silver nanoparticles

Functionalized gold nanoparticles for sensing of pesticides: A review

Gold nanoparticle chitosan composite hydrogel beads show efficient removal of methyl parathion from waste water

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