An automatic, vigorous-injection assisted dispersive liquid-liquid microextraction technique for stopped-flow spectrophotometric detection of boron

Michal Alexovič, Marcin Wieczorek, Joanna Kozak, Paweł Kos̈cielniak, Ioseph S. Balogh, Vasil Andruch

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

A novel automatic vigorous-injection assisted dispersive liquid-liquid microextraction procedure based on the use of a modified single-valve sequential injection manifold (SV-SIA) was developed and applied for determination of boron in water samples. The major novelties in the procedure are the achieving of efficient dispersive liquid-liquid microextraction by means of single vigorous-injection (250 μL, 900 μL s-1) of the extraction solvent (n-amylacetate) into aqueous phase resulting in the effective dispersive mixing without using dispersive solvent and after self-separation of the phases, as well as forwarding of the extraction phase directly to a Z-flow cell (10 mm) without the use of a holding coil for stopped-flow spectrophotometric detection. The calibration working range was linear up to 2.43 mg L-1 of boron at 426 nm wavelength. The limit of detection, calculated as 3s of a blank test (n=10), was found to be 0.003 mg L-1, and the relative standard deviation, measured as ten replicable concentrations at 0.41 mg L-1 of boron was determined to be 5.6%. The validation of the method was tested using certified reference material.

Original languageEnglish
Pages (from-to)127-133
Number of pages7
JournalTalanta
Volume133
DOIs
Publication statusPublished - Feb 2015

Keywords

  • Automation
  • Boron
  • Dispersiveliquid-liquidmicroextraction
  • Flow batch
  • Stopped-flow principle
  • Water

ASJC Scopus subject areas

  • Analytical Chemistry

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