title: Determination of mercury(II) ions in seafood samples after extraction and preconcentration by a novel functionalized magnetic metal-organic framework nanocomposite.
abstract: 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.
authors: Department of Chemistry, Tabriz Branch, Islamic Azad University, Tabriz, Iran.
authors: Ebrahim
authors: E
authors: Ghorbani-Kalhor
authors: Rahim
authors: R
authors: Hosseinzadeh-Khanmiri
authors: Jafar
authors: J
authors: Abolhasani
authors: Mirzaagha
authors: M
authors: Babazadeh
authors: Akbar
authors: A
authors: Hassanpour
mesh_terms: D008280:Magnetics; D008628:Mercury / Q000032:analysis*; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D053761:Nanocomposites; D009930:Organic Chemicals / Q000737:chemistry*; D017747:Seafood / Q000032:analysis*; D017550:Spectroscopy, Fourier Transform Infrared; D014961:X-Ray Diffraction
chemical_list: D009930:Organic Chemicals; D008628:Mercury
keywords: Mercury ions; Metal-organic frameworks; Response surface methodology; Seafood samples; Sorption