Abstract
The (3S,3aS,4S,4aS,7S,9aR,9bR,12S)-7,12-dihydroxy-3-methyl-6-methylene-2-oxoperhydro-4a,7-methano-9b,3-propenoazuleno[1,2-b]furan-4-carboxylic acid (Gibberellic acid (GA)) extraction from aqueous solution by Amberlite La-2 in different diluents (isoamyl alcohol, or octan-1-ol, or decan-1-ol) was studied. According to experimental results, some thermodynamic parameters such as distribution coefficients (KD), loading factors (Z), and extraction efficiency (E) were calculated. The best extraction efficiency, distribution coefficient, and loading factor were determined by isoamyl alcohol diluent at values of 98 %, 97, and 4.6, respectively. Besides, the linear solvation energy relationship (LSER) model regressed to experimental results with a regression coefficient (R square) of 0.98. The LSER model predicts results close to experimental data.
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