Ultrasonic-assisted micro solid phase extraction of arsenic on a new ion-imprinted polymer synthesized from chitosan-stabilized pickering emulsion in water, rice and vegetable samples

Green Synthesis and Biological Assessments of Silver Nanoparticles Using the Plant Extract of Crataegus sinaica Boiss. Fruits

“…An efficient procedure for green synthesis of silver nanoparticles using the aqueous extract of the dried fruits of Crataegus sinaica was used. The reddish-brown color formation is associated with the surface Plasmon resonance with absorption maxima at 394 nm characterized by the generation of metal nanoparticles [23,24]. The aqueous extract of the dried fruits of Crataegus sinaica is rich with active secondary metabolites for instance, flavonoids and phenolics.…”

Molecularly Imprinted Polymers for Dispersive (Micro)Solid Phase Extraction: A Review

“…Finally, one-step coprecipitation under alkaline conditions (Fe 3 O 4 synthesis) in the presence of the diazonium salt BF 4 ( + N 2 -C 6 H 4 -CH 2 -DEDTC) also generates a magnetic core that offers adequate functional groups for mixing with the pre-polymerization mixture and starting the MIP synthesis [165]. On other occasions, surface-modified Fe 3 O 4 with oleic acid was allowed to polymerize with arsenic (III)-2-acetyl benzofuran thiosemicarbazone complex as template, and methacrylic acid as a monomer (ionic imprinted polymer for As(III)) before a Pickering emulsion in the presence of nanoparticles of chitosan [164]. Extraction of As(III) from acid digests from rice and vegetable was achieved after pH adjustment, assisting the loading/elution process by ultrasounds [164].…”

Designing and controlling the morphology of spherical molecularly imprinted polymers

“…Hydrophilic particles tend to form oilin-water emulsions while hydrophobic particles lead to the opposite situation. Until now, silica, [43][44][45][46][47][48][49][50][51][52][53] Fe 3 O 4 particles, [54][55][56][57][58][59] chitosan, [60][61][62] halloysite nanotubes, [54][55][56]63 Janus hydroxyapatite NPs, 64,65 BHb, 66 yeast, 67 lignin, 68 fluorescent NPs, 69 etc., were adopted to stabilize Pickering emulsions for preparation of MIPs. Different particles enjoy different advantages.…”

“…In order to transform hydrophilic MNPs into hydrophobic MNPs, they were modified with polyethylene glycol (PEG) 116,117 or oleic acid (OA), [118][119][120][121][122] then were coated into MIPs by suspension polymerization 118,122 or Pickering emulsion polymerization. 60 For this kind of magnetic MIPs (M-MIPs), serval magnetic microspheres were coated into one MIP particle, as multiple core in one shell. The third was to introduce a thin SiO 2 layer on the surface of the MNPs, and then an inorganic MIP layer was coated by the sol-gel process.…”