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

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 center dot 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 mu g L-1, and the limit of quantification and limit of detection are 0.31 and 0.09 mu g L-1 respectively. The developed RT-CPE-GFAAS technique was successfully used to determinate Copper (II) traces in water samples with affordable results.

Automated summary

A novel environmentally friendly rapid cloud point extraction coupled to graphite furnace atomic absorption spectroscopy (RT-CPE-GFAAS) method was developed for quantification of Copper (II) traces. The optimal conditions for the extraction of Copper (II) complex was determined at room temperature by forming an instant surfactant rich phase of Triton X-100 and complexing Copper (II) with DHMPhB. This method showed affordable results for the determination of Copper (II) traces in water samples.