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A chemiluminescence (CL) detection for the determination of sulfite using the reaction of Ru(bipy) 32+ (bipy=2,2′-bipyridyl) -SO 32− -KMnO 4 is described. The concentration of sulfite is proportional to the CL intensity from 5.0×10 −8 to 1.25×10 −4 mol l −1 . The limit of detection is 2.5×10 −8 mol l −1 and the relative standard...
Water-soluble luminescent CdSe quantum dots surface-modified with triethanolamine (TEA–CdSe-QDs) were prepared with high stability. The fluorescence of the TEA–CdSe-QDs was greatly quenched only when Hg 2+ and I − coexisted in the solution, whereas addition of either Hg 2+ or I − individually has no noticeable effect on the fluorescence emission. Such a unique quenching...
A chemical potential driven micro-membrane sampler for enrichment of trace gaseous carbonyl compounds has been developed. The sampler is composed of exposed parts with membrane and analysis parts with polypropylene tube. The membrane acts as a barrier, through which the analytes dynamically diffuse and transfer from absorbents present outside to extract solvent inside through the difference of chemical...
In this paper we used hydrated mayenite as reactive substrate for NOx active sampling in the air, which is novel. The performance of the mayenite-based sorbent for the NOx tubes was evaluated in two different monitoring surveys (autumn 2015 and winter 2016), characterized by different environmental conditions. Sorbent tubes filled with mayenite were exposed simultaneously to triethanolamine (TEA)-based...
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