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A cationic water soluble porphyrin (5, l0, 15, 20-tetrakis (l-methyl-pyridinium-4-yl)porphyrin. H2tmpyp^(4+)) and its metalloporphyrins (MP) were easily extracted into acetonitrile separated by addition of sodium chloride (4 ㏖ dm^(-3)) in the presence of sodium perchlorate, where M denotes Zn^(2+), Cu^(2+), Co^(3+), Fe^(3+), and Mn^(3+) and p^(2-) is porphyrinate ion. The extracted ion-pair complexes were completely dissociated to [MP(ClO4₄)₃]+, and [MP(ClO4₄)₂]^(2+). The extraction and the dissociation constants were determined by taking into account of the partition constant of sodium perchlorate (K_D=1.82±0.01). The chemical properties of the separated acetonitrile phase as E_T(30) and D_(Ⅱ.Ⅰ) were determined and compared with other water miscible solvents (acetone, actonitrile, 1, 4-dioxane, tetrahydrofuran, 1-propanol and 2-propanol). Furthermore, a sensitive and selective method was proposed for the determination of a subnanogram amount of Gopper(Ⅱ) in natural water samples by using the present salting-out method and the porphyrins.
목차
Abstract
1. Introduction
2. Experimental
3. Results and Discussion
Acknowledgments
References
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UCI(KEPA) : I410-ECN-0101-2009-433-018086644