Intrinsic peroxidase-like activity of 4-amino hippuric acid reduced/stabilized gold nanoparticles and its application in the selective determination of mercury and iron in ground water

Rastogi, Lori; Ankam, Durga Prasad; Dash, K.

doi:10.1016/j.saa.2019.117805

Cited by 8 publications

(1 citation statement)

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“…Literature counts several methods for the selective passivation of NPs as a direct consequence of the presence or absence of an analyte 4 – 6 . Their applicability to real samples, when demonstrated, is usually limited to tap or ground water 7 – 12 . This probably reflects the fact that matrices forming real samples (such as tap water and, even more, environmental and clinical samples) are extremely complex and contain several species responsible for the destabilization of nanoparticles, with consequent loss of catalytic properties.…”

Section: Introductionmentioning

confidence: 99%

A nanocomposite hydrogel with catalytic properties for trace-element detection in real-world samples

Bertolacci

Valentini

Pompa

2020

Sci Rep

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A nanocomposite material characterized by peroxidase-like properties was developed through the dispersion of platinum nanoparticles (PtNPs) inside a hydrogelic matrix. The integration of the PtNP catalysts within the matrix resulted in their stabilization, preventing aggregation and precipitation in media of environmental interest, characterized by high ionic strength and by the presence of organic solutes. A thorough optimization of the matrix design was aimed at granting optimal diffusion of the reagents, in order to maintain the efficiency of the catalytic action. Such combined features allowed the implementation and prototyping of a colorimetric method for the detection of mercury in environmental water samples. The assay was based on a chromogenic reaction catalyzed by the peroxidase-like activity of PtNPs and its specific inhibition caused by trace amounts of mercury.

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