A dispersive liquid-liquid microextraction procedure for determination of boron in water after ultrasound-assisted conversion to tetrafluoroborate

Lenka Rusnáková, Vasil Andruch, I. Balogh, Jana Škrlíková

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

A novel, simple and green procedure is presented for the determination of boron. The method is based on ultrasound-assisted conversion of boron to tetrafluoroborate anion and the formation of an ion pair between BF 4- and Astra Phloxine reagent (R), followed by dispersive liquid-liquid microextraction of the ion pair formed and subsequent UV-vis spectrophotometric detection. The conversion of boron to tetrafluoroborate anion is performed in an acidic medium of 0.9 mol L-1 H2SO 4 in the presence of 0.1 mol L-1 F- by means of 10 min of ultrasonication. The extraction of the ion pair formed between BF4- and R (1 × 10-4 mol L-1 R) is carried out by dispersive liquid-liquid microextraction using 0.5 mL of amyl acetate (as extraction solvent), tetrachloromethane (as auxiliary solvent) and acetonitrile (as dispersive solvent) in a ratio of 1:1:2. The absorbance of the coloured extracts obeys Beer's law in the range 0.22-18.7 mg L-1 of B(III) at 553 nm wavelength. The limit of detection calculated from a blank test (n = 10) based on 3 s is 0.015 mg L-1 of B(III). The method was applied to the determination of boron in mineral waters.

Original languageEnglish
Pages (from-to)541-545
Number of pages5
JournalTalanta
Volume85
Issue number1
DOIs
Publication statusPublished - Jul 15 2011

Fingerprint

Liquid Phase Microextraction
Boron
Ultrasonics
Water
Liquids
Ions
Anions
Mineral Waters
Carbon Tetrachloride
Solvent extraction
Limit of Detection
Wavelength

Keywords

  • Boron
  • Dispersive liquid-liquid microextraction (DLLME)
  • Green analytical chemistry
  • Ultrasound-assisted conversion
  • Water

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

A dispersive liquid-liquid microextraction procedure for determination of boron in water after ultrasound-assisted conversion to tetrafluoroborate. / Rusnáková, Lenka; Andruch, Vasil; Balogh, I.; Škrlíková, Jana.

In: Talanta, Vol. 85, No. 1, 15.07.2011, p. 541-545.

Research output: Contribution to journalArticle

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