Jump to main content
Jump to site search


Selective magnetic mercury(II) ion capturing ligand-doped silica gel for water analysis

Author affiliations

Abstract

Preparation of selective magnetic adsorbents for dispersive micro-solid phase extraction often involves multi-step reactions which are time consuming. This study demonstrates a simplified method for the synthesis of a magnetic adsorbent, which is selective towards the adsorption of mercury(II) ions (Hg2+). In this method, the incorporation of a metal capturing ligand (3-oxo-1,3-diphenylpropyl-2-(naphthalen-2-ylamino) ethylcarbamodithioate) and the coating of magnetic particles with silica gel was performed in a single step. This adsorbent was then used in solid-phase microextraction for the preconcentration of Hg2+ in water. In this study, a mercury analyzer was used to quantify the Hg2+. Under optimized conditions, the developed analytical method achieved a low detection limit (4.0 ng L−1), satisfactory enrichment factor (96.4) and wide linearity range (50.0–5000 ng L−1) with a good coefficient of determination (0.9985) and good repeatability (<7%). The preconcentration factor of this method was 100. This proposed method was also successfully utilized for the determination of Hg2+ in drinking water, tap water and surface water with good recovery (>91%) and high intra-day and inter-day precision.

Graphical abstract: Selective magnetic mercury(ii) ion capturing ligand-doped silica gel for water analysis

Back to tab navigation

Supplementary files

Publication details

The article was received on 05 Dec 2018, accepted on 22 Jan 2019 and first published on 22 Jan 2019


Article type: Paper
DOI: 10.1039/C8AN02362J
Citation: Analyst, 2019, Advance Article

  •   Request permissions

    Selective magnetic mercury(II) ion capturing ligand-doped silica gel for water analysis

    S. W. Khor, Y. K. Lee and K. S. Tay, Analyst, 2019, Advance Article , DOI: 10.1039/C8AN02362J

Search articles by author

Spotlight

Advertisements