Analysis Of Hg(Ⅱ) By Fluorescence Quenching Of Microcapsules And Research Of Metal Nanoparticles By Fluorescence Quenching

Fluorescence analysis method has gained more and more interest of analysts, because it has the advantage of its high sensitivity, selectivity, simple method, good reproducibility, fewer amounts of sample, simple equipment, et al. This paper is analysis of Hg (â…¡) by fluorescence quenching of microcapsules and research of metal nanoparticles by fluorescence quenching.It is well known that Hg²⁺ and its compounds are considered to be high toxicity, which can accumulate in the body. Its high toxicity is attributed to its harmful effects on the central nervous system disturbing haemin synthesis as well as causing neuropsychiatric disorders. Thus, there is a growing attention by people to determine Hg2+ at trace level. The conventional method for determination of Hg²⁺ is extraction spectrophotometric method, which is based on extraction of a specific analyte from water phase into organic phase causing a change in some properties, such as, absorbance, fluorescence intensity etc. Although these methods are generally sensitive, they need a mass of organic solvent as extraction phase, which can cause environmental pollution easily, and it takes long time for equilibrium of two phases during extraction process. Thus, it is of interest to develop a novel method for detecting Hg²⁺ in aqueous phase with less use of organic solvent. The advantage of microcapsule technology is the properties of core of encapsulated and separation of environment can preserve without effect when it becomes microcapsule. So we...