Preconcentration of Total Mercury from River Water by Anion Exchange Mechanism

Daye, Mirna; Ouddane, Baghdad; Halwani, Jalal; Hamze, M.

doi:10.2116/analsci.29.955

Cited by 5 publications

(1 citation statement)

References 29 publications

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“…Table and Table S1 summarize the recent development of Hg 2+ detection by Au nanosphere-based colorimetric assays and by a wide array of techniques. The LOD of our method is at least 1–5 and 1–2 orders of magnitude lower than those of the reported colorimetric methods using Au nanospheres − and those of the common methods involving ICP/MS, atomic fluorescence spectrophotometry, and atomic absorption spectrometry. ,,− …”

Section: Resultsmentioning

confidence: 65%

Single Gold Nanoparticle-Based Colorimetric Detection of Picomolar Mercury Ion with Dark-Field Microscopy

Liu

Zhang

et al. 2016

Anal. Chem.

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Mercury severely damages the environment and human health, particularly when it accumulates in the food chain. Methods for the colorimetric detection of Hg(2+) have increasingly been developed over the past decade because of the progress in nanotechnology. However, the limits of detection (LODs) of these methods are mostly either comparable to or higher than the allowable maximum level (10 nM) in drinking water set by the US Environmental Protection Agency. In this study, we report a single Au nanoparticle (AuNP)-based colorimetric assay for Hg(2+) detection in solution. AuNPs modified with oligonucleotides were fixed on the slide. The fixed AuNPs bound to free AuNPs in the solution in the presence of Hg(2+) because of oligonucleotide hybridization. This process was accompanied by a color change from green to yellow as observed under an optical microscope. The ratio of changed color spots corresponded with Hg(2+) concentration. The LOD was determined as 1.4 pM, which may help guard against mercury accumulation. The proposed approach was applied to environmental samples with recoveries of 98.3 ± 7.7% and 110.0 ± 8.8% for Yuquan River and industrial wastewater, respectively.

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Section: Resultsmentioning

confidence: 65%

Single Gold Nanoparticle-Based Colorimetric Detection of Picomolar Mercury Ion with Dark-Field Microscopy

Liu

Zhang

et al. 2016

Anal. Chem.

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Determination of mercury at picogram level in natural waters with inductively coupled plasma mass spectrometry by using 3D printed metal scavengers

Kulomäki

Lahtinen

Perämäki

et al. 2019

Analytica Chimica Acta

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Magnetic sulfur-doped porous carbon for preconcentration of trace mercury in environmental water prior to ICP-MS detection

Peng

Chen

et al. 2017

Analyst

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A novel magnetic sulfur-doped porous carbon (MSPC) was fabricated via a simple one-step carbonization of a mixture of sucrose, basic magnesium sulfate whiskers and FeO@SiO nanoparticles. Due to the high S content, the prepared MSPC possessed high adsorption capacity for Hg (343 mg g) with good selectivity. Based on this, a method coupling magnetic solid phase extraction (MSPE) with inductively coupled plasma mass spectrometry (ICP-MS) was developed for the determination of trace Hg in environmental water samples. Various parameters such as pH, desorption solvent and its concentration, desorption volume and time, sample volume, and adsorption time that affect the determination have been optimized. Under the optimal conditions, a high enrichment factor of 100-fold was obtained, the limit of detection (LOD) was found to be 0.52 pg mL with a relative standard deviation (c = 10 pg mL, n = 7) of 7.1%, and a good linearity was obtained within the concentration range of 2-5000 pg mL for Hg. Besides, the proposed method has very fast adsorption/desorption kinetics, target Hg could be rapidly adsorbed on the prepared MSPC in 2 min and desorbed from the MSPC in 2 min with the assistance of a permanent magnet. Therefore, the proposed method of MSPE-ICP-MS exhibits good application potential in the determination of trace Hg in environmental water samples.

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Preconcentration of Total Mercury from River Water by Anion Exchange Mechanism

Cited by 5 publications

References 29 publications

Single Gold Nanoparticle-Based Colorimetric Detection of Picomolar Mercury Ion with Dark-Field Microscopy

Single Gold Nanoparticle-Based Colorimetric Detection of Picomolar Mercury Ion with Dark-Field Microscopy

Determination of mercury at picogram level in natural waters with inductively coupled plasma mass spectrometry by using 3D printed metal scavengers

Magnetic sulfur-doped porous carbon for preconcentration of trace mercury in environmental water prior to ICP-MS detection

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