Microwave digestion coupled with spectrophotometry for rapid analysis of the total aluminum in polyaluminum solutions


1 Department of Chemistry, Huzhou University, Huzhou 313000, China

2 Colleges of Chemical Engineering, Nanjing Forestry University, Nangjing 210037, China


The traditional measurement methods of 3 kinds of aluminum species and the total aluminum content in polyaluminum solutions are Al-Ferron timed complex spectrophotometry and EDTA chelatometry respectively. But each
of these methods has different deficiencies. In this paper, microwave digesting technical had be coupled with the radiate Ferron spectrophotometry to rapid mensurate the concentration of total aluminum AlT in polyaluminum solutions. Test results show that: (1) it has a very great influence on the measured value whether the Ferron mixed chromogenic solutions after deploys different time or not, but it can been put into use immediately after microwave digested 30 s, which overcomes the weakness that must set 5 days at the traditional method; (2) Proved at the same time that it can assay quantitatively the total aluminum content in some water treatment reagents of polyaluminum solutions conveniently by microwave digesting 2 min for the mixed solutions of the Ferron mixed chromogenic solutions and the polyaluminum solutions. The feasibility of this method has been verified by modified Al-Ferron timed complex spectrophotometry at the same time


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