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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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 |
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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 |
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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 |
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Lobregas, Michaela Olisha S. Bantang, Jose Paolo O. Camacho, Drexel H. |
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Lobregas, Michaela Olisha S. Bantang, Jose Paolo O. Camacho, Drexel H. |
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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 |
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Animo Repository |
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2019 |
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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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