title: Ion-imprinted magnetic nanoparticles for specific separation and concentration of ultra-trace methyl mercury from aqueous sample.
abstract: For rapidly and sensitively determining ultra-trace methyl mercury (MeHg) in aqueous environment, we herein synthesized a MeHg ion-imprinted magnetic nanoparticle (MeHg IIMN) to simply and specifically extract/concentrate ultra-trace MeHg from water samples. The MeHg IIMN employed core-shell Fe3O4@SiO2nanoparticles (Fe3O4@SiO2NPs) as supporting structure, the complex ion of 1-pyrrolidinecarbodithioic acid and MeHg (PDC-CH3Hg+) as template, methacrylic acid (MAA) as functional monomer and trimethylolpropane trimethacrylate (TMPTM) as cross linker. The MeHg IIMN offered obvious advantages such as low cost, easy manipulation, better specificity and stability, and recycling characteristics. It can be used to separate/concentrate ultra-trace MeHg from natural water sample within 30min with a recovery >95%, an enrichment factor of 250, a relative standard deviation (RSD, n=5) <7%, a 25mg MeHg/g of maximum adsorption capacity, 50 times of recycling, and without obvious interference of other ions. Combining with capillary electrophoresis-inductively coupled plasma mass spectrometry (CE-ICP-MS), it can be used for the accurate detection of ultra-trace methyl mercury in natural water samples with a limit of detection of 0.084pg/mL, a recovery of 92-99% and a RSD (n=5)<8%. The success of this study promises a valuable technique for relatively simple detection of ultra-trace methyl mercury in aqueous environment.
authors.affiliation: Key Lab of Analysis and Detection for Food Safety of Ministry of Education, Fujian Provincial Key Lab of Analysis and Detection for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China; College of Life Sciences, Fujian Agriculture and Forest University, Fuzhou, Fujian, China.
authors.forename: Wenjing
authors.initials: W
authors.lastname: Jiang
authors.affiliation: Key Lab of Analysis and Detection for Food Safety of Ministry of Education, Fujian Provincial Key Lab of Analysis and Detection for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Jin
authors.affiliation: Key Lab of Analysis and Detection for Food Safety of Ministry of Education, Fujian Provincial Key Lab of Analysis and Detection for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China.
authors.forename: Xinhui
authors.initials: X
authors.lastname: Yu
authors.affiliation: Key Lab of Analysis and Detection for Food Safety of Ministry of Education, Fujian Provincial Key Lab of Analysis and Detection for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China.
authors.forename: Weihua
authors.initials: W
authors.lastname: Wu
authors.affiliation: Key Lab of Analysis and Detection for Food Safety of Ministry of Education, Fujian Provincial Key Lab of Analysis and Detection for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China.
authors.forename: LiangJun
authors.initials: L
authors.lastname: Xu
authors.affiliation: Key Lab of Analysis and Detection for Food Safety of Ministry of Education, Fujian Provincial Key Lab of Analysis and Detection for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China. Electronic address: fengfu@fzu.edu.cn.
authors.forename: FengFu
authors.initials: F
authors.lastname: Fu
mesh_terms: D019075:Electrophoresis, Capillary; D052203:Ferrosoferric Oxide; D007477:Ions / Q000737:chemistry; D057230:Limit of Detection; D058185:Magnetite Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D013058:Mass Spectrometry; D008767:Methylmercury Compounds / Q000032:analysis* / Q000302:isolation & purification; D012822:Silicon Dioxide / Q000737:chemistry; D012997:Solvents / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000302:isolation & purification
chemical_list: D007477:Ions; D058185:Magnetite Nanoparticles; D008767:Methylmercury Compounds; D012997:Solvents; D014874:Water Pollutants, Chemical; D012822:Silicon Dioxide; D052203:Ferrosoferric Oxide
keywords: Ion imprinted polymer; Magnetic nano-particle; Mercury; Methyl mercury; Speciation analysis