Separation and Determination of Metals in Mixed Solvent System on Anion Exchanger Using Atomic Absorption Spectrophotometer
The use of 2-propanol in admixture with formic acid for the selective elution of cations on the ionexchange resin Amberlite IRA-420 in Cl- form is investigated. The elution technique was coupled with absorption spectrometry and atomic absorption spectrophotometry. The distribution coefficients of metal ions were measured in 2-propanol-water-formic acid mixture. By applying distribution coefficient data, conditions for column separation of mixtures have been effected by eluting with 2-propanol-water-formic acid solution of different compositions. The average recovery for all separations (n =18) was within 95.1 – 98.3 % and the standard deviation for all data was 10%. The developed analytical methodology was successfully applied for the separation and quantification of metal ions in the microgram range from the real samples collecting from natural water and industrial effluents using UV-Visible and AAS techniques.
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