Determination of mercury(II) ions in seafood samples after extraction and preconcentration by a novel functionalized magnetic metal-organic framework nanocomposite

This work describes a novel functionalized magnetic metal–organic framework nanocomposite [(Fe3O4‐2,5‐dimercapto‐1,3,4‐thiadiazole)/metal–organic framework] and its application in the preconcentration of Hg(II) ions. The parameters affecting the preconcentration procedure were optimized by a Box–Beh...

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Bibliographic Details
Published in:Journal of separation science 2015-04, Vol.38 (7), p.1179-1186
Main Authors: Ghorbani-Kalhor, Ebrahim, Hosseinzadeh-Khanmiri, Rahim, Abolhasani, Jafar, Babazadeh, Mirzaagha, Hassanpour, Akbar
Format: Article
Language:English
Subjects:
Atomic absorption analysis
Chromatography
Elution
Extraction
Magnetics
Mercury (metal)
Mercury - analysis
Mercury ions
Metal-organic frameworks
Microscopy, Electron, Scanning
Microscopy, Electron, Transmission
Nanocomposites
Nanostructure
Optimization
Organic Chemicals - chemistry
Response surface methodology
Seafood
Seafood - analysis
Seafood samples
Sorption
Spectroscopy, Fourier Transform Infrared
Standard deviation
X-Ray Diffraction
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Summary:This work describes a novel functionalized magnetic metal–organic framework nanocomposite [(Fe3O4‐2,5‐dimercapto‐1,3,4‐thiadiazole)/metal–organic framework] and its application in the preconcentration of Hg(II) ions. The parameters affecting the preconcentration procedure were optimized by a Box–Behnken design through response surface methodology. Three variables (uptake time, magnetic nanosorbent amount, and pH value) were selected as the main factors affecting the sorption step, while four variables (type, volume, and concentration of the eluent; and elution time) were selected as main factors in the optimization study of the elution step. Following the sorption and elution of analytes, the ions were quantified by cold vapor atomic absorption spectrometry. Under the optimum conditions, the limit of detection was 0.01 ng/mL and all the relative standard deviations were less than 10%. The obtained sorption capacity (in mg/g) of this new sorbent was 124. Ultimately, this nanocomposite was successfully applied to the rapid extraction of trace quantities of Hg(II) ions in seafood samples and satisfactory results were obtained.
ISSN:1615-9306
1615-9314
DOI:10.1002/jssc.201401320