Determination Time of the Mononuclear Aluminum Species in the Hydroxyl Polyaluminum Solution by Ferron (7-iodine-8-hydroxyquinoline-5-sulfonic Acid)-Timed Spectrometry

The right choice of the determining time of mononuclear Al must be established on the basis of the sufficient reaction between chromogenic reagent and the hydroxyl polyaluminum solution.

But this question has never been noted, which resulted in the confusion of application and research of this assay. In this work, the effect of variation of the determining time on the accurate determination of mononuclear Al in the hydroxyl polyaluminum solution was first studied. The experimental results showed that 60 s was the best under the appropriate dosage of 7-iodine-8-hydroxyquinoline-5-sulfonic acid.