Surface Enhanced Raman Scattering Spot Tests: A New Insight on Feigl’s Analysis Using Gold Nanoparticles | Zendy

Daniel Grasseschi | Zendy; Vitor M. Zamarion | Zendy; Koiti Araki | Zendy; Henrique E. Toma | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

Surface Enhanced Raman Scattering Spot Tests: A New Insight on Feigl’s Analysis Using Gold Nanoparticles

Author(s) -

Daniel Grasseschi,

Vitor M. Zamarion,

Koiti Araki,

Henrique E. Toma

Publication year - 2010

Publication title -

analytical chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.117

H-Index - 332

eISSN - 1520-6882

pISSN - 0003-2700

DOI - 10.1021/ac102238f

Subject(s) - chemistry , dithizone , raman scattering , raman spectroscopy , nanoparticle , reagent , colloidal gold , ion , metal ions in aqueous solution , analytical chemistry (journal) , filter paper , analyte , molecule , nanotechnology , inorganic chemistry , chromatography , organic chemistry , optics , physics , materials science

Traditional Feigl's spot tests can be greatly improved with the aid of gold nanoparticles and Raman probes, by monitoring the changes in the surface enhanced Raman scattering (SERS) of the analytes directly applied on a filter paper previously impregnated with the selective organic reagent. As a proof of concept, diphenylthiocarbazone (dithizone) was treated with citrate stabilized gold nanoparticles and employed in paper spot tests for a variety of transition and heavy metal ions. Below 10(-5) mol L(-1), only mercury(II) ions were able to displace the dithizone molecules from the "coordination shell" of the gold nanoparticles, leading to a systematic decay of the Raman signals. Because of the huge enhancement of the dithizone vibrational peaks, the SERS spot tests allowed the detection of picograms of Hg(2+) ions.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research