Aluminum - Pyrocatechol Violet (cas 115-41-3) reactivity with various complexing agents
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Add time:08/26/2019 Source:sciencedirect.com
A spectrophotometric method for determining the speciation of aluminum using Pyrocatechol Violet (cas 115-41-3) (PCV) is tested on a series of known ligands over a range of concentrations and at two fixed pH values. The procedure assumes that the colorimetric signal is defined by the competition of the Al-ligand complex with Al-PCV. The stability constants determined are in agreement with literature values. Time to steady state is more than 10 min. A procedure for determining the conditional stability constant, the total ligand concentration and the reactive A1 at a fixed pH is proposed.
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