Cloud Point Extraction Methodology for Separation and Extraction Platinum (II) as Chloro Complex Anion Coupled with Spectrophotometric Method for Determination in Different Samples

Abstract

Whereas the platinum is very important metal with several special properties to provide it as expensive metal with important using , for separation preconcentration and extraction platinum as Chloroanion PtCl₄⁼ according to cloud point extraction method used Triton X-100 at optimum conditions such as 1M HCl with 1x10^-4M Janus green (JG) and 0.5 mL of 1%  Triton X-100 Cloud point layer Formation at 75?C of heating in electrostatic water bath for 15 minutes , The stoichiometric study show the more probable structure of ion association Complex extraction was [JG+ ; HPtCl₄^-] , with thermodynamic data ?H_ex = 0.0814KJ mol^-1 , ?G_ex =-61.42 KJ mol^-1 and ?S_ex = 176.7J mol^-1 K^-1, the main method for extraction show D.L = 6.8028*10^-6 S=0.003133 µg cm^-1 R.S.D= 0.00885                               the maximum absorbance wave length was = 690 nm  and ?= 6227.861 L mol^-1 cm^-1

Keywords: platinum, cloud point extraction