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A rapid cloud point extraction of Molybdenum(VI) with 6,7-dihydroxy-2,4-diphenylbenzopyrylium perchlorate prior to its spectrophotometric determination

Denys Snigur, Dmytro Barbalat, Alexander Chebotarev, Anastasiia Synievyd, and Kateryna Bevziuk

Odessa I.I. Mechnikov National University, Odessa, Ukraine



Received: 19 August 2020  Accepted: 17 November 2020



A novel and rapid cloud point extraction at room temperature (RT-CPE) for preconcentration of Molybdenum(VI) binded with 6,7-dihydroxy-2,4-diphenylbenzopyrylium perchlorate coupled with spectrophotometric detection was developed. The proposed technique includes the formation of red complex of Molybdenum(VI) with 6,7-dihydroxy-2,4-diphenylbenzopyrylium perchlorate (DHDPhB), its extraction at room temperature into chemically induced Triton X-100 surfactant-rich phase, and measurement of absorbance at 560 nm. Optimal RT-CPE conditions were found: 0.8% (v/v) of Triton X-100 and 0.04 M of sodium salicylate for initiating of RT-CPE; pH 1.8; 2.5·10–5 M of DHDPhB. The calibration plot is linear in the Molybdenum(VI) concentrations range of 7.9–160 μg L−1 and limit of detection is 2.3 μg L−1. The developed RT-CPE method has been successfully applied to spectrophotometric determination of Molybdenum(VI) traces in water and milk samples.

Graphic abstract

Keywords: Room-temperature cloud point extraction; Spectrophotometry; Molybdenum(VI); Water analysis

Full paper is available at

DOI: 10.1007/s11696-020-01436-3


Chemical Papers 75 (5) 1823–1830 (2021)

Tuesday, May 28, 2024

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