Sub-ppb mercury detection in real environmental samples with an improved rhodamine-based detection system

TALANTA

卷:224

Article

Singh, Sukhdev²  Coulomb, Bruno¹  Boudenne, Jean-Luc¹  Bonne, Damien²  Dumur, Frederic³  Simon, Bertrand^4,5  Robert-Peillard, Fabien¹ 

[1] Aix Marseille Univ, LCE, CNRS, Marseille, France

[2] Aix Marseille Univ, ISm2, Cent Marseille, CNRS, Marseille, France

[3] Aix Marseille Univ, CNRS, ICR, UMR 7273, F-13397 Marseille, France

[4] Inst Opt, Talence, France

[5] CNRS, Lab Photon Numer & Nanosci, Talence, France

关键词: Fluorescent sensor;    Mercury ion;    Rhodamine derivative;    Water analysis;   

DOI  :  10.1016/j.talanta.2020.121909

来源: Elsevier

【 摘 要 】

A new procedure is described for the determination of Hg2+ ions in water samples. A Rhodamine based fluorescent sensor was synthesized and the experimental conditions were specifically optimized for application to environmental samples, which requires low detection limits and high selectivity in competitive experiments with realistic concentrations of other metal ions. Incorporation of a Rhodamine-6G fluorophore to a previously described sensor and optimization of the buffer system (detection with acetic acid at pH 5.25) enabled significant enhancement of the sensitivity (detection limit = 0.27 mu g L-1) and selectivity. The optimized procedure using high-throughput microplates has been applied to tap and river waters with good results.

【 授权许可】

Free