A novel fast room-temperature cloud point extraction coupled to graphite furnace atomic absorption spectroscopy for Copper(II) traces determination

ABSTRACT

A novel environmentally friendly rapid cloud point extraction at room temperature coupled to graphite furnace atomic absorption spectroscopy (RT-CPE-GFAAS) for Copper (II) traces quantification was developed. Were found the most optimal conditions for the instant surfactant rich phase of Triton X-100 formation and the extraction of Copper (II) as a complex with 6,7-dihydroxy-2-phenyl-4-methylbenzopyrylium perchlorate (DHMPhB) at room temperature immediately: addition of 0.5 mol L⁻¹ H₂SO₄ solution to pH 4.5; 0.15 mol L⁻¹ ammonium benzoate; 1.5 · 10^–4 mol L⁻¹ DHMPhB and 1 v/v.% Triton X-100. As a diluent for surfactant rich phase was used 2-propanol. The calibration plot constructed under the optimal conditions is linear in the range of Copper (II) concentrations of 0.31–127 μg L⁻¹, and the limit of quantification and limit of detection are 0.31 and 0.09 μg L⁻¹ respectively. The developed RT-CPE-GFAAS technique was successfully used to determinate Copper (II) traces in water samples with affordable results.

KEYWORDS:

• 6
• 7-dihydroxy-2-phenyl-4-methylbenzopyrylium perchlorate
• Copper (II)
• graphite furnace atomic absorption spectroscopy
• room-temperature cloud point extraction
• water analysis

Disclosure statement

No potential competing interest was reported by the authors..

Supplementary material

Supplemental data for this article can be accessed online at https://doi.org/10.1080/03067319.2022.2118593