title: An optical sensor for mercuric ion based on immobilization of Rhodamine B derivative in PVC membrane.
abstract: A novel prepared mercuric ion PVC membrane sensor based on a Rhodamine B derivative (RND) as a selective sensing material was described. The sensor exhibited a specific fluorescent off-on response to Hg(2+), and showed a linear response over the Hg(2+) concentration range from 1.0 × 10(-9) to 2.0 × 10(-3)M with a very low detection limit of 8.1 × 10(-10)M in bulk method. The sensor has also been incorporated into a flow-cell for determination of Hg(2+) in flowing streams with improved sensitivity and detection limit. The sensor shows excellent selectivity toward Hg(2+) with respect to common coexisting cations. The proposed fluorescence optode was successfully applied to detect Hg(2+) in environmental water samples and fish.
authors.affiliation: College of Chemistry and Environmental Engineering, Chongqing University of Arts and Sciences, Yongchuan 402168, PR China.
authors.forename: Lixin
authors.initials: L
authors.lastname: Ling
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhao
authors.forename: Juan
authors.initials: J
authors.lastname: Du
authors.forename: Dan
authors.initials: D
authors.lastname: Xiao
mesh_terms: D000818:Animals; D005399:Fishes; D005456:Fluorescent Dyes; D005504:Food Analysis; D008567:Membranes, Artificial; D008628:Mercury / Q000032:analysis*; D055096:Optical Devices; D011143:Polyvinyl Chloride; D012235:Rhodamines / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis
chemical_list: D005456:Fluorescent Dyes; D008567:Membranes, Artificial; D012235:Rhodamines; D014874:Water Pollutants, Chemical; D011143:Polyvinyl Chloride; D008628:Mercury; C029773:rhodamine B