title: Accurate quantification of two key time points used in the determination of hydroxyl polyaluminum species by ferron timed spectrophotometry.
abstract: The content of mononuclear Al (Ala%) changed with its determination time (ta) under different dosages of Ferron (7-iodo-8-hydroxyquinoline-5-sulfonic acid, [Ferron]), and the change of Ala% with [Ferron] at different ta was systematically investigated for the first time. Thus, the most appropriate ta was found with the optimal [Ferron]. Also, the judgment of the platform (flat or level portion) of the complete reaction on the absorption-time curve determined in the hydroxyl polyaluminum solution by Ferron timed spectrophotometry (Ferron assay) was first digitized. The time point (tb) of complete reaction between the medium polyaluminum (Alb) and Ferron reagent depended on the reaction extent, and time could not be used only to judge. Thus, the tb was accurately determined and reduced to half of original, which improved the experiment efficiency significantly. The Ferron assay was completely optimized.
authors: Zhejiang Pharmaceutical College, Department of Biology and Food, Ningbo, 315100, People's Republic of China.
authors: Jing
authors: J
authors: Zhang
authors: Xiaojing
authors: X
authors: Yong
authors: Dongyan
authors: D
authors: Zhao
authors: Qiuyi
authors: Q
authors: Shi
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D013057:Spectrum Analysis / Q000379:methods*; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000737:chemistry
chemical_list: D014874:Water Pollutants, Chemical; D000535:Aluminum