Trace amount determination of Cd(ii), Pb(ii) and Ni(ii) ions in agricultural and seafood samples after magnetic solid phase extraction by MIL-101(Cr)/phenylthiosemicarbazide-functionalized magnetite nanoparticle composite

Abstract

Herein, a novel nanosorbent consisting of phenylthiosemicarbazide magnetite nanoparticles and MIL-101(Cr) was synthesized, characterized and utilized to magnetic solid phase extraction of some heavy metals in various agricultural and seafood samples.

Fabrication of a novel magnetic metal–organic framework functionalized with 2-aminothiophenol for preconcentration of trace silver amounts in water and wastewater

“…Fabrication of Fe 3 O 4 @SiO 2 NPs was conducted according to our previously reported works. 8,34 To functionalize the Fe 3 -O 4 @SiO 2 NPs, 2.0 g fabricated Fe 3 O 4 @SiO 2 NPs were added to 150 mL dried toluene, and stirred for 30 min. Then, 3.0 mL 3-CPTS was added to the mixture and it was reuxed for 15 h at 130 C. Thereaer, the product was magnetically separated and then washed with ethanol and acetone.…”

“…Aer that, 0.5 g Fe 3 O 4 @SiO 2 @2-ATP NPs was added to 30 mL aquatic solution containing 2.0 mmol Cr(NO 3 ) 3 $9H 2 O (solution 2). Aerward, two mixtures (1 and 2) were transferred into an autoclave and it was heated at 200 C for 20 h. 8,34 Finally, MIL-101(Cr)/Fe 3 O 4 @SiO 2 @2-ATP NPs was isolated magnetically and washed with deionized water (4 Â 25 mL) and ethanol (5 Â 25 mL), respectively, and then dried at ambient temperature. MIL-101(Cr)/Fe 3 O 4 @SiO 2 @2-ATPwas characterized by FT-IR spectroscopy, VSM, CHNS, FESEM, and XRD techniques.…”

“…33 Among divers type of MOFs, MIL-101(Cr) is one of the widely utilized adsorbent owing to its high chemical stability in the wide range of pH, large specic high surface area and high metal content. 34 Herein, a novel MMOF functionalized with 2-aminothiophenol (2-ATP) was fabricated and employed for the separation/preconcentration of trace silver amounts. At rst magnetite nanoparticles (Fe 3 O 4 NPs) was synthesized and then coated with SiO 2 .…”

Selective extraction and determination of beryllium in real samples using amino-5,8-dihydroxy-1,4-naphthoquinone functionalized magnetic MIL-53 as a novel nanoadsorbent

“…MNPs@SiO 2 nanoparticles (NPs) was prepared according to the literatures [19][20][21] and the detailed information were provided in ESI. † For functionalization, in brief 1.0 g silica-coated magnetite NPs (Fe 3 O 4 @SiO 2 ) was addedto 75 mL dried toluene, and then 1.0 g 3-CPTES was added to the mixture and the reaction continued at 130 C for 18 h under the reux condition.…”

Synthesis of Magnetic Metal-Organic Frame Material and Its Application in Food Sample Preparation

“…It was worth noting that this nFe 3 O 4 @MIL-88A(Fe)/APTMS nanocomposite was easily regenerated and the adsorptive removal values were decreased by only 3% after five consecutive recycling processes. Safari et al, have developed a MMOFs composite consisting of phenylthiosemicarbazide MNPs (Fe 3 O 4 @PTSC) and MIL-101(Cr), and further utilized in MSPE to effectively isolate and simultaneously determine the heavy metals including Cd 2+ , Pb 2+ and Ni 2+ in agricultural and seafood samples [185]. By combining with flame atomic absorption spectrometry (FAAS), the developed MSPE method obtained the lower LODs (0.07-0.5 mg/kg), lower quantification limits (0.2-2.0 mg/kg), wide linear ranges (0.25-250 mg/kg) and good extraction recoveries (97.5-99.0%).…”