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

• Published in: Ultrasonics sonochemistry 2020-03, Vol.61, p.104802-104802, Article 104802
• Main Authors: Jalilian, Rahil, Shahmari, Mahtab, Taheri, Alireza, Gholami, Kamyar
• Format: Article
• Language: English
• Subjects: Arsenic - isolation & purification; Arsenic speciation; Chitosan - chemistry; Colloids - chemistry; Emulsions; Experimental design; Hydride generation atomic absorption spectrometry; Magnetic imprinted polymer; Oryza - chemistry; Pickering emulsion polymerization; Polymers - chemistry; Solid Phase Microextraction - methods; Ultrasonic Waves; Ultrasonic-assisted micro solid phase extraction; Vegetables - chemistry; Water
• ISSN: 1350-4177; 1873-2828
• DOI: 10.1016/j.ultsonch.2019.104802

•Hydride generation Spectrocopy is used due to its fast analysis and acceptable selectivity.•Ultrasonic power leads to dramatic increase in mass transfer, faster start-up and micro-mixing.•Solid colloidal particles act as stabilizers to controlle and stable of nano-absorbents. Pickering emulsion polymerization has been employed for the Ultrasonic assisted-micro solid phase extraction (UA-µSPE) of ultra trace arsenic species by a new magnetic ion imprinted polymer (MIIP) prior to hydride generation atomic absorption spectrometry. 2-acetyl benzofuran thiosemicarbazone (2-ABT) as a new chelating agent and core- shell hydrophobic magnetic nanoparticles was synthesized and the polymerization was carried out at the presence of arsenic – ligand complex, crosslinker, monomer, initiator, stabilizing agent and water-oil emulsion magnetic carrier. In second step, the nanoparticles and polymers were characterized. The analytical parameters such as pH, amount of polymer and ultrasonic time were selected and optimozed by Plackett–Burman and Box–Behnken designs respectively. Linear dynamic range, detection limit and relative standard deviation were 0.01–85.000 µg·L−l, 0.003 µg·L−l, and 3.21%, respectively. The proposed preconcentration procedure was successfully applied to the determination of arsenic ion in a wide range of food samples with different and complex matrixes.