Preconcentration and Spectrophotometric Determination of Copper and Nickel in some Medicinal PlantsafterCloud Point Extraction

Abstract

In this work,Cloud point extraction (CPE) methodology as an one green chemistry method is used for extraction, enrichment and determination ofNi (II) and Cu (II) in the somemedicinal plants,by use organic reagent2-[ (6-Methyl-2-Benzothiazolyl)azo]-4-Chloro Phenol (6-MeBTAClP) for formationthe extracted complexes into micelles of Triton X-114 as a mediated extractant at65,70 C0 respectively. The extracted product in densityhigh (cloud point layer )is separated from the aqueous layer by centrifugation for 15 min and dissolved in 0.5 mLfrom ethanol followed the determination of Ni (II) and Cu (II)by using spectrophotometry at a wavelength maximum of 644 and 598 nm respectively. The optimum conditions established as pH, The linear range of Ni (II) and Cu (II)along with limit of detection,precision expressed as relative standard deviation for seven replication measurements and the recovery range were obtained for Ni (II) and Cu (II) ions,respectively. The complex s identified by UV-Visible and IR spectra. The mole ratio method and continuous variation method (Job’s method)also investigated.