Catalytic spectrophotometric determination of trace aluminium with indigo carmine.

A new catalytic spectrophotometric method is described for the determination of trace amounts of Al(III). The methods based on catalytic action of Al(III) on the oxidation of indigo carmine (IC) by ammonium persulfate in hexamethylene tetramine-hydrochloric acid ((CH2)6N4-HCl) buffer medium (pH 5.4) and in the presence of surfactant-TritonX-100.

[New progress in the study on and application of organic pollutants photodegraded by nano-TiO2].

Based on the newest papers about nano-TiO2, the mechanisms of photocatalysis, ways of improving photocatalytic performance, and influencing factors of environment are discussed in this article. And the progresses in the study on some novel catalysis-enhanced or catalysis-assisted technologies such as infrared treatment, electric field effect, microwave effect and ultrasonic effect are introduced. Finally, the applications to waste water treatment, air refreshment in limited space and specially functional materials preparation in the last two years are reviewed.