Phase transfer membrane supported liquid–liquid–liquid microextraction combined with large volume sample injection capillary electrophoresis–ultraviolet detection for the speciation of inorganic and organic mercury

Li, Pingjing; Xing, Zhang; Hu, Bin

doi:10.1016/j.chroma.2011.10.071

Cited by 36 publications

(24 citation statements)

References 29 publications

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“…Originally, the CuDDTC 2 complex was employed as a specific ligand to recognize the Hg species. Because Hg has a high affinity for soft donors such as sulfur, 25,26 in the presence…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Colorimetric Detection of Mercury Species Based on Functionalized Gold Nanoparticles

Chen

2014

ACS Appl. Mater. Interfaces

225

109

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The speciation analysis of heavy metal pollutants is very important because different species induce different toxicological effects. Nanomaterial-assisted optical sensors have achieved rapid developments, displaying wide applications to heavy metal ions but few to metal speciation analysis. In this work, a novel colorimetric nanosensor strategy for mercury speciation was proposed for the first time, based on the analyte-induced aggregation of gold nanoparticles (Au NPs) with the assistance of a thiol-containing ligand of diethyldithiocarbamate (DDTC). Upon the addition of mercury species, because Hg-DDTC was more stable than Cu-DDTC, a placedisplacement between Hg species and Cu 2+ would occur, and thereby the functionalized Au NPs would aggregate, resulting in a color change. Moreover, by virtue of the masking effect of ethylenediaminetetraacetic acid (EDTA), the nanosensor could readily discriminate organic mercury and inorganic mercury (Hg 2+ ), and it is thus anticipated to shed some light on the colorimetric sensing of organic mercury. So, a direct, simple colorimetric assay for selective determination of Hg species was obtained, presenting high detectability, such as up to 10 nM for Hg 2+ and 15 nM for methylmercury. Meanwhile, the strategy offered excellent selectivity toward mercury species against other metal ions. The simple, rapid, and sensitive label-free colorimetric sensor for the determination of Hg species provided an attractive alternative to conventional methods, which usually involve sophisticated instruments, complicated processes, and long periods of time. More importantly, by using mercury as a model, an excellent nanomaterial-based optical sensing platform can be developed for speciation analysis of trace heavy metals, which can lead to nanomaterials stability change through smart functionalization and reasonable interactions.

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“…Originally, the CuDDTC 2 complex was employed as a specific ligand to recognize the Hg species. Because Hg has a high affinity for soft donors such as sulfur, 25,26 in the presence…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Colorimetric Detection of Mercury Species Based on Functionalized Gold Nanoparticles

Chen

2014

ACS Appl. Mater. Interfaces

225

109

View full text Add to dashboard Cite

show abstract

“…Most commonly, Hg species are detected by UV after derivatization [80,81]; however, complexing agents can produce interference from co-migrating species, which can be misinterpreted. More recently, hyphenation of CE with ICP-MS was used for Hg speciation in fish and water samples and resulted in exceptionally low LODs of 21-32 ng l −1 , but is rarely used [82].…”

Section: Capillary Electrophoresismentioning

confidence: 99%

Mercury Toxicity and Speciation Analysis

et al. 2016

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“…Among these techniques, ICP-MS is the most widely employed because of its highest analytical sensitivity with a wide linear dynamic range and the capability of isotopic determination. Chromatographic techniques such as gas chromatography (GC) [7,[9][10][11][12], high performance liquid chromatography (HPLC) [8,[13][14][15][16], ion chromatography (IC) [17,18] and capillary electrophoresis (CE) [19][20][21][22] are the most effective separation techniques for the speciation of mercury due to the merits of high separation resolution. Besides, a number of simple, sensitive and low cost non-chromatographic speciation schemes have been proposed for mercury speciation.…”

Section: Introductionmentioning

confidence: 99%

Magnetic solid phase extraction coupled with inductively coupled plasma mass spectrometry for the speciation of mercury in environmental water and human hair samples

Chen

et al. 2016

Talanta

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Phase transfer membrane supported liquid–liquid–liquid microextraction combined with large volume sample injection capillary electrophoresis–ultraviolet detection for the speciation of inorganic and organic mercury

Cited by 36 publications

References 29 publications

Colorimetric Detection of Mercury Species Based on Functionalized Gold Nanoparticles

Colorimetric Detection of Mercury Species Based on Functionalized Gold Nanoparticles

Mercury Toxicity and Speciation Analysis

Magnetic solid phase extraction coupled with inductively coupled plasma mass spectrometry for the speciation of mercury in environmental water and human hair samples

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