magnetite nanoparticles

Preconcentration of Е110 and Е124 Food Azodyes on Magnetite Nanoparticles Modified by CTAB

Authors: Kazimirova K. O., Khabibullin V. R., Reshetnikova I. S., Egunova O. R., Shtykov S. N.

Synthetic azodyes are widely used in paint, textile, plastic, and food, beverage, and leather, cosmetic, pharmaceutical and paper industries to make products more visually attractive to consumers. Therefore, they are also the components of waste waters and should be removed due to their potential risk to human health. Many techniques have been employed to eliminate dyes from waste water and do to preconcen- tration before analysis in food or beverage objects. One of the most popular and effective is magnetic solid-phase extraction (MSPE) with the use of magnetic nanoparticles (MNP).

Detection of Pharmaceuticals Using Magnetic Sers-active Core–Shell Structures

Authors: Markina N. E., Pozharov M. V., Zakharevich A. M., Burmistrova N. A., Markin A. V.

The work is devoted synthesis, investigation and application of composites based on calcium carbonate microspheres, with embedded nanoparticles of magnetite (Fe3O4), coated by silver nanostructured shell. This composite (SERS-substrate) was used for surface-enhanced Raman spectra (SERS) registration of rhodamine 6G and different pharmaceuticals such as ipratropium bromide, chloramphenicol, propranolol, pindolol, tamoxifen, diltiazem.

Sorption-fluorimetric Determination of Enrofloxacin with Magnetite Nanoparticles Modified by Polyethylenimine

Authors: Egunova O. R., Reshetnikova I. S., German S. V., Kazimirova K. O., Khabibullin V. R., Zhelobitskaya E. A., Shtykov S. N.

A technology for magnetite nanoparticles surface modification by polyethylenimine was proposed. The sizes of the nanoparticles using transmittance microscopy method were determined. The influence of pH, time of mixing, sorbent and antibiotic concentration on the enrofloxacin sorption was investigated and optimal conditions of extraction were found. Enrofloxacin sorption from plasma-modelling solution was studied and was shown that that in optimal conditions the extent of sorption is 78% and desorption from magnetite modified nanoparticles using ethanol-sodium dodecylsulfate is 95%.