title: Fluorimetric detection of boron by azomethine-H in micellar solution and sol-gel.
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.
authors.affiliation: Sabanci University, Engineering and Natural Sciences, Istanbul, Turkey.
authors.forename: Erinc
authors.initials: E
authors.lastname: Merdivan
authors.forename: Yalim
authors.initials: Y
authors.lastname: Benibol
authors.forename: Serap
authors.initials: S
authors.lastname: Seyhan
mesh_terms: D001895:Boron / Q000032:analysis* / Q000737:chemistry / Q000378:metabolism; D002138:Calibration; D004526:Efficiency; D005470:Fluorometry / Q000379:methods; D005782:Gels / Q000737:chemistry*; D007477:Ions / Q000494:pharmacology; D046911:Macromolecular Substances / Q000737:chemistry / Q000378:metabolism; D008823:Micelles; D009282:Naphthalenesulfonates / Q000737:chemistry / Q000378:metabolism / Q000494:pharmacology*; D044367:Phase Transition; D012996:Solutions / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013882:Thiosemicarbazones / Q000737:chemistry / Q000378:metabolism / Q000494:pharmacology*
chemical_list: D005782:Gels; D007477:Ions; D046911:Macromolecular Substances; D008823:Micelles; D009282:Naphthalenesulfonates; D012996:Solutions; D013882:Thiosemicarbazones; C097966:azomethine H; D001895:Boron