Fluorimetric detection of boron by azomethine-H in micellar solution and sol-gel

Spectrochim Acta A Mol Biomol Spectrosc. 2009 Jan;71(5):2045-9. doi: 10.1016/j.saa.2008.07.042. Epub 2008 Aug 5.

Abstract

Mixtures of boron and azomethine-H in solution result in slow complexation. Addition of sodium dodecyl sulfate (SDS), polyethylene glycol dodecyl ether (Brij-35), 4-(1,1,3,3-tetramethylbutyl)phenyl-polyethylene glycol (TritonX-100), and cetyltrimethyl ammonium bromide (CTAB) result in considerable decrease in complexation time and enhancement in signal of peak in solution and also sol-gel. The fluorescence of the complex is monitored at an emission wavelength of 486 nm with excitation at 416 nm. The presence of 1x10(-3) mol L(-1) SDS decreased the complexation time up to 10 min in solution and 20 min in sol-gel for above 0.25 microg B mL(-1) and 30 min in solution and 35 min in sol-gel for below 0.25 microg B mL(-1). However, the photostability did not change by adding micelle in both media. The proposed method shows a linear response toward boron in the concentration range of 0.05-10 microg mL(-1) and is selective for boron over a large number of electrolytes and cations. The detection limit was 7 microg L(-1). This method has been used for the detection of boron in environmental water samples and fruit juices with satisfactory results.

Publication types

  • Evaluation Study

MeSH terms

  • Boron / analysis*
  • Boron / chemistry
  • Boron / metabolism
  • Calibration
  • Efficiency
  • Fluorometry / methods
  • Gels / chemistry*
  • Ions / pharmacology
  • Macromolecular Substances / chemistry
  • Macromolecular Substances / metabolism
  • Micelles*
  • Naphthalenesulfonates / chemistry
  • Naphthalenesulfonates / metabolism
  • Naphthalenesulfonates / pharmacology*
  • Phase Transition
  • Solutions / chemistry*
  • Spectrometry, Fluorescence
  • Thiosemicarbazones / chemistry
  • Thiosemicarbazones / metabolism
  • Thiosemicarbazones / pharmacology*

Substances

  • Gels
  • Ions
  • Macromolecular Substances
  • Micelles
  • Naphthalenesulfonates
  • Solutions
  • Thiosemicarbazones
  • azomethine H
  • Boron