A spectrophotometric method for manganese determination in water samples based on ion pair formation and dispersive liquid-liquid microextraction

I. Balogh, L. Rusnáková, J. Škrlíková, L. Kocúrová, M. Török, V. Andruch

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

In this work, a simple, inexpensive, and environmentally friendly extractive spectrophotometric method for the determination of manganese is suggested. The method is based on the formation and dispersive liquid-liquid microextraction (DLLME) of a violet-coloured ion pair of Mn(II) with 1,3,3-trimethyl-2-[3-(3-methyl-3H-benzothiazol-2-ylidene)-propenyl]-3H-indolium (BTIC) in the presence of 1-nitroso-2-naphthol (HL) as ligand, and subsequent UV-VIS spectrophotometric detection at 560 nm of the ion pair formed. The appropriate experimental conditions for the DLLME procedure were found to be: a pH of 9.5; 0.12 mmol L-1 of BTIC; extraction solvent - toluene containing 1.75 mmol L-1 of HL; disperser solvent - methanol; auxiliary solvent - tetrachloromethane. Beer's law is obeyed in the range 0.055-0.88 μg mL-1 of Mn(II). The limit of detection (LOD), calculated based on three times of the standard deviation of the blank test (n = 10), was found to be 0.004 μg mL-1 of Mn(II). The precision (as relative standard deviation, RSD%) and accuracy (as recovery percentage, R%) of the method were examined by performing five replicate determinations at four concentration levels over two days and varied between 1.2 and 3.8, and 97.7 and 104.5, respectively. The suggested method was successfully applied to the analysis of various water samples (mineral water, spring water and drinking water).

Original languageEnglish
Pages (from-to)1059-1071
Number of pages13
JournalInternational Journal of Environmental Analytical Chemistry
Volume92
Issue number9
DOIs
Publication statusPublished - Aug 2012

Fingerprint

Liquid Phase Microextraction
Manganese
manganese
Ions
ions
liquid
ion
Water
Liquids
2-naphthol
water
Mineral Waters
sampling
mineral water
Naphthol
water analysis
carbon tetrachloride
Springs (water)
Carbon Tetrachloride
toluene

Keywords

  • auxiliary solvent
  • dispersive liquid-liquid microextraction (DLLME)
  • ion pair
  • manganese
  • UV-VIS spectrophotometry
  • water

ASJC Scopus subject areas

  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis
  • Environmental Chemistry
  • Analytical Chemistry
  • Soil Science

Cite this

A spectrophotometric method for manganese determination in water samples based on ion pair formation and dispersive liquid-liquid microextraction. / Balogh, I.; Rusnáková, L.; Škrlíková, J.; Kocúrová, L.; Török, M.; Andruch, V.

In: International Journal of Environmental Analytical Chemistry, Vol. 92, No. 9, 08.2012, p. 1059-1071.

Research output: Contribution to journalArticle

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T1 - A spectrophotometric method for manganese determination in water samples based on ion pair formation and dispersive liquid-liquid microextraction

AU - Balogh, I.

AU - Rusnáková, L.

AU - Škrlíková, J.

AU - Kocúrová, L.

AU - Török, M.

AU - Andruch, V.

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