title: Sensitive metal ions (II) determination with resonance Raman method.
abstract: In this paper, a new proposal for the quantitative evaluation of divalent metal ions (M(2+)) is developed by the use of the competitive resonance Raman (RR)-based method. Upon excitation with light of the appropriate wavelength (532 nm), a strong electric field is generated that couples with the resonance of the complex (zincon-M(2+)), increasing the character signals of these complexes, resulting in sensitive detection. Herein, the RR probe, zincon-M(2+) complex that the RR intensity gets lower with the decreasing of the M(2+) concentration, which leads to the transformation of the Raman information. As a result, by using the proposed RR-based method, we could find the liner calibration curves of Cu(2+) and Ni(2+), which show the potential in quantitative evaluation of an unknown sample. In addition, the abundant fingerprint information shows that RR leads to the successful analysis of a blended solution, which contains two ions: Cu(2+) and Ni(2+).
authors.affiliation: State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, PR China.
authors.forename: Zhi
authors.initials: Z
authors.lastname: Yu
authors.forename: Lucas A
authors.initials: LA
authors.lastname: Bracero
authors.forename: Lei
authors.initials: L
authors.lastname: Chen
authors.forename: Wei
authors.initials: W
authors.lastname: Song
authors.forename: Xu
authors.initials: X
authors.lastname: Wang
authors.forename: Bing
authors.initials: B
authors.lastname: Zhao
mesh_terms: D002413:Cations, Divalent / Q000032:analysis; D002614:Chelating Agents / Q000737:chemistry*; D003300:Copper / Q000032:analysis*; D005562:Formazans / Q000737:chemistry*; D009532:Nickel / Q000032:analysis*; D012680:Sensitivity and Specificity; D013059:Spectrum Analysis, Raman / Q000379:methods*
chemical_list: D002413:Cations, Divalent; D002614:Chelating Agents; D005562:Formazans; C009809:2-carboxy-2'-hydroxy-5'-sulfoformazylbenzene; D003300:Copper; D009532:Nickel