Open AccessDispersive Liquid-Liquid Semi-Microextraction of Сu(II) with 6,7-dihydroxy-2,4-diphenylbenzopyrylium Chloride for its Spectrophotometric Determination
Author(s) -
А. Н. Чеботарев,
Anastasiia Klochkova,
Vitaliy Dubovyi,
Denys Snigur
Publication year - 2020
Publication title -
acta chimica slovenica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.289
H-Index - 46
eISSN - 1580-3155
pISSN - 1318-0207
DOI - 10.17344/acsi.2020.5939
Subject(s) - chloroform , chemistry , copper , detection limit , tap water , chloride , methanol , calibration curve , chromatography , extraction (chemistry) , liquid liquid , absorption (acoustics) , analytical chemistry (journal) , materials science , organic chemistry , environmental engineering , engineering , composite material
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/dm3 of DHDPhB, 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%.