Dispersive Liquid-Liquid Semi-Microextraction of Сu(II) with 6,7-dihydroxy-2,4-diphenylbenzopyrylium Chloride for its Spectrophotometric Determination

Authors

  • Alexander Chebotarev Odessa I.I. Mechnicov National University
  • Anastasiia Klochkova Odessa I.I. Mechnicov National University
  • Vitaliy Dubovyi Odessa I.I. Mechnicov National University
  • Denys Snigur Odessa I.I. Mechnicov National University

DOI:

https://doi.org/10.17344/acsi.2020.5939

Keywords:

Dispersive liquid-liquid semi-microextraction, spectrophotometry, copper(II), rocks analysis.

Abstract

A novel dispersive liquid-liquid semi-microextraction (DLLsME) procedure for copper(II) preconcentration is proposed. The system containing copper(II) and 6,7-dihydroxy-2,4-diphenylbenzopyrylium chloride (DHDPhB), after addition a mixture of chloroform and methanol becomes cloudy and the formation of the organic phase was observed immediately. The optimal conditions of DLLsME were found to be: pH 5, absorption band maximum was 570 nm, 1 cm3 of 1×10-3 mol/dm3ofDHDPhB, and mixed extractant containing 1 cm3 of chloroform and 1 cm3 of methanol. Under optimal conditions, the calibration plot was linear in the range of copper(II) concentration 4.32–65 µg/dm3 and the limit of detection was 1.29 µg/dm3. The rocks and tap water samples were successfully analyzed according to the suggested procedure with RSD no more than 4.9%.

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Published

15.12.2020

Issue

Vol. 67 No. 4 (2020)

Section

Analytical chemistry

License

Except where otherwise noted, articles in this journal are published under the Creative Commons Attribution 4.0 International License