title: Removal of sudan dyes from water with C18-functional ultrafine magnetic silica nanoparticles.
abstract: In this study, the new C(18)-functionalized ultrafine magnetic silica nanoparticles (C(18)-UMS NPs) were successfully synthesized and applied for extraction of sudan dyes in water samples based on the magnetic solid-phase extraction (MSPE). The extraction and concentration were carried out in one step by blending C(18)-UMS NPs and water samples. The sudan dyes adsorbed C(18)-UMS NPs were isolated from the matrix easily with an external magnetic field. After desorption the quantitation of sudan dyes was done by ultra fast liquid chromatography (UFLC). Satisfactory extraction recovery can be obtained with only 50 mg C(18)-UMS NPs. The effects of experimental parameters, including the amount of the nanoparticles, extraction time, pH value, desorption solvent, volume of desorption solvent and desorption time were investigated. The limits of detection for sudan I, II, III and IV were 0.066, 0.070, 0.12 and 0.12 ng mL(-1), respectively. Recoveries obtained by analyzing the six spiked water samples were between 68% and 103%.
authors.affiliation: College of Chemistry, Jilin University, Qianjin Street 2699, Changchun 130012, PR China.
authors.forename: Chunzhu
authors.initials: C
authors.lastname: Jiang
authors.forename: Ying
authors.initials: Y
authors.lastname: Sun
authors.forename: Xi
authors.initials: X
authors.lastname: Yu
authors.forename: Lei
authors.initials: L
authors.lastname: Zhang
authors.forename: Xiumin
authors.initials: X
authors.lastname: Sun
authors.forename: Yan
authors.initials: Y
authors.lastname: Gao
authors.forename: Hanqi
authors.initials: H
authors.lastname: Zhang
authors.forename: Daqian
authors.initials: D
authors.lastname: Song
mesh_terms: D000327:Adsorption; D001391:Azo Compounds / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid; D057230:Limit of Detection; D060526:Magnetic Fields; D008280:Magnetics; D053758:Nanoparticles / Q000737:chemistry*; D009284:Naphthols / Q000032:analysis*; D012822:Silicon Dioxide / Q000737:chemistry*; D052616:Solid Phase Extraction; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis
chemical_list: D001391:Azo Compounds; D009284:Naphthols; D014874:Water Pollutants, Chemical; D014867:Water; C024336:1-phenylazo-2-naphthol; D012822:Silicon Dioxide; C033003:sudan red; C009213:Scarlet Red; C033006:sudan III