Details

Autor(en) / Beteiligte

• Liu, Haizhu
• Yu, Ping
• Du, Dan
• He, Chunyan
• Qiu, Bin
• Chen, Xi
• Chen, Guonan

Titel

Rhodamine-based ratiometric fluorescence sensing for the detection of mercury(II) in aqueous solution

Ist Teil von

• Talanta (Oxford), 2010-04, Vol.81 (1), p.433-437

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2010

Link zum Volltext

Quelle

MEDLINE

Beschreibungen/Notizen

• Novel ratiometric fluorescent silica nanoparticles with high selectivity towards Hg 2+ were synthesized for the detection of Hg 2+. Hg 2+ promoted the ring opening of spirolactam in the rhodamine moiety grafted onto the silica nanoparticles, resulting in a change in the fluorescence intensity. The fluorescence intensity was proportional to the Hg 2+ concentration, and the detection limit (S/N = 3) for Hg 2+ was found to be 2.59 × 10 −9 mol L −1 with a linear range from 0.4 to 8 × 10 −7 mol L −1. In addition, the morphology of the silica nanoparticles, the effects of pH and co-existing substances, and the reversibility were investigated. The proposed approach was successfully applied to the determination of Hg 2+ in water samples.