Surfacted ferrofluid based dispersive solid phase extraction; a novel approach to preconcentration of cationic dye in shrimp and water samples. (15th October 2015)

• Record Type: Journal Article
• Authors: Fasih Ramandi, Negin; Shemirani, Farzaneh
• Is Part Of: Food chemistry. Volume 185(2015)
• Page Start: 398
• Page End: 404
• Publication Date: 2015-10-15
• Subjects: Surfacted ferrofluid -- Surfacted ferrofluid based dispersive solid phase extraction -- Magnetic nanoparticles -- Green extraction -- Cationic dye; Food -- Analysis -- Periodicals; Food -- Composition -- Periodicals; 664
• DOI: 10.1016/j.foodchem.2015.03.042
• Languages: English
• ISSNs: 0308-8146

Abstract

Highlights: First application of surfacted ferrofluid in preconcentration of methylene blue in water and shrimp samples. Dispersive solid phase extraction was assisted by surfacted ferrofluid. High enrichment factor and good performance for methylene blue analysis in food samples. Simple, fast, efficient preconcentration–separation method was introduced. Extraction time was greatly reduced. Abstract: Surfacted ferrofluid (S-FF) is a stable colloid dispersion of magnetic nanoparticles in a carrier liquid which possesses magnetic properties and fluidity simultaneously. Specifically in S-FF coating magnetic nanoparticles with a suitable surfactant provides steric repulsions to prevent particles agglomeration. Selecting the function of surfactant can be engineered according to its application. In the present study, for the first time the application of S-FF in dispersive solid phase extraction of methylene blue (as a cationic dye model) in water and shrimp samples was investigated. For this purpose, in order to use ionic liquid as carrier fluid, the surface of Fe3 O4 nanoparticles was coated by an anionic surfactant in a polar medium to form a hydrophilic layer around magnetic nanoparticles. In addition to hydrophobic interactions between the analyte and carbonic chain of surfactant, the retention of cationic dye was mainly governed by attractive electrostatic interactions between polar head of surfactant and dye. Under optimized conditions, the relative standard deviation is 2.9%, the limit of detection is 2.5 μg L −1, and the preconcentration factor is 135.