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A Novel Fe3O4/Poly (Aniline-Naphthylamine)-Based Nanocomposite for Magnetic Solid Phase Extraction of Rhodamine B from Aquatic Samples

Daliri, Rasoul | 2012

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 43982 (03)
  4. University: Sharif University of Technology
  5. Department: Chemistry
  6. Advisor(s): Bagheri, Habib
  7. Abstract:
  8. A novel Fe3O4/poly (aniline-naphthylamine) (ANI-NA)-based nanocomposite was synthesized by chemical oxidative polymerization process as a magnetic sorbent for magnetic solid phase extraction. The extraction efficiency of this sorbent was examined by isolation of rhodamine B (RhB), a mutagenic and carcinogenic dye from aquatic media in dispersion mode. The efficiency of the synthesized Fe3O4/copolymer composite was examined and compared with Fe3O4/polyaniline (PANI) and Fe3O4/polynaphthylamine (PNA) by quantification of RhB using spectrofluorimetry. Among them, Fe3O4/poly (ANI-NA) nanocomposite showed a prominent efficiency. The scaning electron microscopy (SEM) image of the synthesized nanocomposite revealed that the copolymer posses a porous structure with diameters less than 50 nm. Effect of different parameters influencing the extraction efficiency including desorption solvent, amount of sorbent, desorption time, sample pH, ionic strength, extraction time and stirring rate were optimized. Under optimum conditions a linear calibration curve in the range of 0.35-5.00 μg L−1 with R2 = 0.9991 was obtained. The limits of detection (3Sb) and limits of quantification (10Sb) of the method were 0.10 and 0.35 μg L−1 (n=3), respectively. The relative standard deviation (RSD) for water sample spiked with 0.50 μg L−1 of RhB was 4.2% (n = 5) and the absolute recovery for solution sample was 92%. The method was applied for the determination of RhB in dishwashing foam, dishwashing liquid, shampoo, red pencil, matches tips and eye shadows samples and the relative recovery percentage were in the range of 94- 99%
  9. Keywords:
  10. Iron Oxide Nanoparticles ; Magnetic Solid Phase Extraction ; Poly (Aniline-Co-Naphthylamine) ; Spectrofluorometry ; Rhodamine B

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