Ultrasensitive determination of mercury(II) using a chemiluminescence system composed of permanganate, rhodamine B and gold nanoprisms

Autor:	Nafiseh Bagheri, Yones Mosaei Oskoei, Javad Hassanzadeh
Rok vydání:	2015
Předmět:	Detection limit Chemistry Permanganate Analytical chemistry chemistry.chemical_element Nanoparticle Analytical Chemistry Mercury (element) law.invention chemistry.chemical_compound Potassium permanganate Colloidal gold law Rhodamine B Chemiluminescence
Zdroj:	Microchimica Acta. 182:1635-1642
ISSN:	1436-5073 0026-3672
Popis:	The article describes a highly sensitive and fairly simple chemiluminescence (CL) assay for mercury(II) ions. The CL system consists of an alkaline solution of rhodamine B (RhoB) and KMnO4 whose weak emission undergoes a large enhancement in presence of gold nanoparticles and, in particular, of anisotropic gold nanoprisms (Au-NPr). CL intensity is, however, decreased in the presence of Hg(II) by suppressing the interaction between RhoB and Au-NPr. Based on this finding, a method was developed for the determination of Hg(II). Under optimum conditions, Hg(II) can be quantified in the 67 pM to 33.3 nM concentration range, and the detection limit (at 3 σ) is 27 pM. In comparison to other nanoparticle based methods, the one described here has a strongly improved LOD as shown in the successful analysis of environmental water samples.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f495b8b0b5a9db63127e7863a8174ccd https://doi.org/10.1007/s00604-015-1494-8 Zobrazit plný text záznamu Plný text ve formátu PDF