Abstract
Ferrofluids (FFs) constitute a type of tunable magnetic material, formed by magnetic nanoparticles suspended in a liquid carrier. The astonishing magnetic properties of these materials and their liquid nature have led to their extended use in different applications, including fields such as magnetochemistry, optics, and biomedicine, among others. Recently, FFs have been incorporated as extractant materials in magnetic-driven analytical sample preparation procedures, thus, permitting the development of different applications. FF-based extraction takes advantage of both the magnetic susceptibility of the nanoparticles and the properties of the liquid carrier, which are responsible for a wide variety of interactions with analytes and ultimately are a key factor in achieving better extraction performance. This review article classifies existing FFs in terms of the solvent used as a carrier (organic solvents, water, ionic liquids, deep eutectic solvents, and supramolecular solvents) while overviewing the most relevant analytical applications in the last decade.
Highlights
IntroductionFerrofluids (FFs) are stable and quite homogeneous colloidal dispersions of ferromagnetic nanoparticles in a solvent referred to as the carrier
Ferrofluids (FFs) constitute a type of tunable magnetic material, formed by magnetic nanoparticles suspended in a liquid carrier
Recent interest in FFs within sample preparation methods is undoubtedly linked to their impressive magnetic properties, and the maintaining of a liquid nature that ensures outstanding solvation abilities
Summary
Ferrofluids (FFs) are stable and quite homogeneous colloidal dispersions of ferromagnetic nanoparticles in a solvent referred to as the carrier These materials have the properties of both of their components: (i) the magnetic nanoparticles (MNPs), which confer a paramagnetic behavior to the suspension; and (ii) the carrier, which is responsible for the fluidic nature of the material [1]. It is the main component in the FF (90–97%), providing its liquid nature (despite the presence of small amounts of solid particles in suspension) It is responsible for most FFs properties. The main preparation procedure of FFs is quite simple: the direct mixing of the precursors (stabilized MNPs and carrier, or MNPs, stabilizer, and carrier) for a certain time, to ensure the formation of a quite homogeneous colloidal suspension. The aim of this review article is to provide an overview of the use of FFs in analytical sample preparation methods in the last decade, paying attention to the nature of the carrier of the FF used together with green aspects related to the FF and its preparation
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
