Carrageenan-stabilized silver nanoparticle gel probe kit for colorimetric sensing of mercury (II) using digital image analysis

Hydrophilic gelling kit consisting of carrageenan-stabilized silver nanoparticles (AgNPs) is described herein as a selective probe for the colorimetric detection of Hg2+. Spherical AgNPs with surface plasmon resonance (SPR) at 430 nm and TEM size of less than 100 nm were synthesized using κ-carragee...

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Main Authors: Lobregas, Michaela Olisha S., Bantang, Jose Paolo O., Camacho, Drexel H.
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Published: Animo Repository 2019
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Online Access:https://animorepository.dlsu.edu.ph/faculty_research/2524
https://animorepository.dlsu.edu.ph/context/faculty_research/article/3523/type/native/viewcontent
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spelling oai:animorepository.dlsu.edu.ph:faculty_research-35232021-09-03T03:07:57Z Carrageenan-stabilized silver nanoparticle gel probe kit for colorimetric sensing of mercury (II) using digital image analysis Lobregas, Michaela Olisha S. Bantang, Jose Paolo O. Camacho, Drexel H. Hydrophilic gelling kit consisting of carrageenan-stabilized silver nanoparticles (AgNPs) is described herein as a selective probe for the colorimetric detection of Hg2+. Spherical AgNPs with surface plasmon resonance (SPR) at 430 nm and TEM size of less than 100 nm were synthesized using κ-carrageenan to give a dark brown gelling mixture (Carr-AgNP) that were used directly for colorimetric reaction with various metal ions. The reaction is selective only to Hg2+. The dark brown color of the Carr-AgNP was found to fade as the concentration of Hg2+ increases until the mixture turns white. It can detect Hg2+ at a concentration of ≥350 ppm with limits of detection at 2.92 × 10−4 M. Quantification of the color change was established using digital photometry with strong correlation observed for L*, R and G color parameters. The role of chlorides in the colorimetric sensing is critical to detecting Hg2+ as excess chlorides promote the formation of AgCl as well as the dissolution of AgNP. The utility of the gelling kit was successfully applied for the detection of mercury(II) in a cosmetic cream sample. © 2019 2019-11-01T07:00:00Z text text/html https://animorepository.dlsu.edu.ph/faculty_research/2524 https://animorepository.dlsu.edu.ph/context/faculty_research/article/3523/type/native/viewcontent Faculty Research Work Animo Repository Nanoparticles Colorimetry Mercury Chemistry
institution De La Salle University
building De La Salle University Library
continent Asia
country Philippines
Philippines
content_provider De La Salle University Library
collection DLSU Institutional Repository
topic Nanoparticles
Colorimetry
Mercury
Chemistry
spellingShingle Nanoparticles
Colorimetry
Mercury
Chemistry
Lobregas, Michaela Olisha S.
Bantang, Jose Paolo O.
Camacho, Drexel H.
Carrageenan-stabilized silver nanoparticle gel probe kit for colorimetric sensing of mercury (II) using digital image analysis
description Hydrophilic gelling kit consisting of carrageenan-stabilized silver nanoparticles (AgNPs) is described herein as a selective probe for the colorimetric detection of Hg2+. Spherical AgNPs with surface plasmon resonance (SPR) at 430 nm and TEM size of less than 100 nm were synthesized using κ-carrageenan to give a dark brown gelling mixture (Carr-AgNP) that were used directly for colorimetric reaction with various metal ions. The reaction is selective only to Hg2+. The dark brown color of the Carr-AgNP was found to fade as the concentration of Hg2+ increases until the mixture turns white. It can detect Hg2+ at a concentration of ≥350 ppm with limits of detection at 2.92 × 10−4 M. Quantification of the color change was established using digital photometry with strong correlation observed for L*, R and G color parameters. The role of chlorides in the colorimetric sensing is critical to detecting Hg2+ as excess chlorides promote the formation of AgCl as well as the dissolution of AgNP. The utility of the gelling kit was successfully applied for the detection of mercury(II) in a cosmetic cream sample. © 2019
format text
author Lobregas, Michaela Olisha S.
Bantang, Jose Paolo O.
Camacho, Drexel H.
author_facet Lobregas, Michaela Olisha S.
Bantang, Jose Paolo O.
Camacho, Drexel H.
author_sort Lobregas, Michaela Olisha S.
title Carrageenan-stabilized silver nanoparticle gel probe kit for colorimetric sensing of mercury (II) using digital image analysis
title_short Carrageenan-stabilized silver nanoparticle gel probe kit for colorimetric sensing of mercury (II) using digital image analysis
title_full Carrageenan-stabilized silver nanoparticle gel probe kit for colorimetric sensing of mercury (II) using digital image analysis
title_fullStr Carrageenan-stabilized silver nanoparticle gel probe kit for colorimetric sensing of mercury (II) using digital image analysis
title_full_unstemmed Carrageenan-stabilized silver nanoparticle gel probe kit for colorimetric sensing of mercury (II) using digital image analysis
title_sort carrageenan-stabilized silver nanoparticle gel probe kit for colorimetric sensing of mercury (ii) using digital image analysis
publisher Animo Repository
publishDate 2019
url https://animorepository.dlsu.edu.ph/faculty_research/2524
https://animorepository.dlsu.edu.ph/context/faculty_research/article/3523/type/native/viewcontent
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