Notice of RetractionPhase-Separation Sublation Using Magnesium(II) as a Ligand for Determination of Trace Oxytetracycline in Water Samples

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.

Phase-separation solution was studied as a method of separation and pre-concentrating trace of oxytetracycline(OTC) as magnesium(II) complex for their determination. The experimental conditions, such as pH of solution, amount of magnesium(Π) as ligand, stirring time, gas flow rate and floatation time, were optimized. Different non-ionic surfactants and types of organic solvents were optimized for efficient sublation. The results of the experiment were as follows: the hydrophobic complex composed of Mg(II) and OTC was floated into organic phase under the optimal conditions: pH=10, the floatation equipment is home-made. The n-propyl alcohol is organic solvent, sodium chloride is separating phase reagent. The datas were obtained by spectrophotometry after floatation; the linear regression equation was A=2.33×10⁵C(mol · L^-1)+0.2179. The linear ranges were from 3.77×10^-7 to 6.32×10^-5 mol · L^-1, respectively, with the correlation coefficient (r) better than r=0.9997. The relative recoveries were 99.7% to 100.3%. The limit of detection was 4.29 × 10^-8 mol · L^-1. It can be applied to analyse the trace OTC in water sample, the results were better.