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A polyaluminum chloride (PAC) sample was prepared using a slow alkaline titration method. The Bio-Gel P-100 gel column chromatographic technique was used to separate and char- acterize the various forms of aluminum present in the prepared PAC solution. The effluents from a gel column were monitored using online chemical method: Al-Ferron timed complexation spectropho- tometry and by 27Al nuclear magnetic resonance (NMR) spectroscopy. Effects of different experi- mental conditions such as eluent flow rate, ionic strength and pH on separation of Al13 were investi- gated. Experimental results indicated that molecule size exclusion was not the only parameter af- fecting the column chromatographic separation efficiency of Al13 but molecule charge as well. Re- ducing the eluent flow rate, increasing the ionic strength and suitable pH resulted in increase in the separation efficiency. Experimental results clearly indicated that by varying the experimental condi- tions, it is possible to produce pure Al13 species using a gel column chromatographic technique.
The polyaluminum chloride (PAC) sample was prepared using a slow alkaline titration method. The Bio-Gel P-100 gel column chromatographic technique was used to separate and char- acterize the various forms of aluminum present in the prepared PAC solution. The effluents from A gel column was monitored using online chemical method: Al-Ferron timed complexation spectropho- tometry and by 27Al nuclear magnetic resonance (NMR) spectroscopy. Effects of different experi- mental conditions such as eluent flow rate, ionic strength and pH on separation of Al 13 were investi- gated. Experimental results indicating that the molecule size exclusion was not the only parameter af- fecting the column chromatographic separation efficiency of Al13 but the molecule charge as well. increase in the separation efficiency. Experimental results clearly pointed that by varying the experimental condi- tions, it is possible to produ ce pure Al13 species using a gel column chromatographic technique.