Solid phase extraction of trace amounts of silver, cadmium, copper, mercury, and lead in various food samples based on ethylene glycol bis-mercaptoacetate modified 3-(trimethoxysilyl)-1-propanethiol coated Fe3O4 nanoparticles

• Published in: Food chemistry Vol. 151; pp. 300 - 305
• Main Authors: Mashhadizadeh, Mohammad Hossein, Amoli-Diva, Mitra, Shapouri, Mahmoud Reza, Afruzi, Hossein
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 15.05.2014; Elsevier
• Subjects: 3-(Trimethoxysilyl)-1-propanethiol; Biological and medical sciences; Bis-mercaptoacetate; Chemical and industrial products toxicology. Toxic occupational diseases; Ethylene Glycol - chemistry; Food toxicology; Heavy metals; Magnetic nanoparticles; Medical sciences; Metals and various inorganic compounds; Nanoparticles; Solid phase extraction; Solid Phase Extraction - methods; Solvents; Spectroscopy, Fourier Transform Infrared; Sulfhydryl Compounds - chemistry; Thunnus; Toxicology; Trace Elements - chemistry; Bis-mercaptoacetate; Solid phase extraction; Heavy metals; Magnetic nanoparticles; 3-(Trimethoxysilyl)-1-propanethiol; Cadmium; Ethylene glycol; 3-(Trimethoxysilyl )-1-propanethiol; Transition metal; Ultrafine particle; Inorganic element; Heavy metal; Organic solvent; Silver; Lead; Copper; Mercury; Food
• ISSN: 0308-8146; 1873-7072
• DOI: 10.1016/j.foodchem.2013.11.082

•Fe3O4 nanoparticles were coated by TMSP modified by EGBM as adsorbent.•SPE of trace amounts of Ag, Cd, Cu, Hg, and Pb from food samples was investigated.•SEM, XRD, and FT-IR characterised the synthesised adsorbent.•The LODs of 0.07, 0.06, 0.09, 0.01, 0.08ngmL−1 were found for silver, cadmium, copper, mercury, and lead. Extraction, pre-concentration, and determination of trace amounts of silver, cadmium, copper, mercury, and lead from some food samples were investigated by magnetic solid phase extraction using Fe3O4 nanoparticles coated with 3-(trimethoxysilyl)-1-propanethiol and modified with ethylene glycol bis-mercaptoacetate as a new adsorbent. SEM, X-ray diffraction, and FT-IR were used to characterise the adsorbent. Metal ions were measured using ICP-OES, except for mercury, which was determined by CV-AAS method. Various factors affecting the extraction and desorption of target metal ions were investigated. 1mL of 1mol/L HCl and 5% thiourea was used as eluent. The detection limits of 0.07, 0.06, 0.09, 0.01, and 0.08ng/mL were obtained for silver, cadmium, copper, mercury, and lead with enrichment factors of 240, 294, 297, 291, and 236, respectively. The method was used for determination of target metal ions in rice, canned tuna fish, and tea leaves.