Record number :
Title of article :
Determination of pesticides by capillary chromatography and SERS detection using a novel Silver-Quantum dots “sponge” nanocomposite
Author/Authors :
Carrillo-Carriَn، نويسنده , , Carolina and Simonet، نويسنده , , Bartolomé M. and Valcلrcel، نويسنده , , Miguel and Lendl، نويسنده , , Bernhard، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2012
Pages :
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Abstract :
In this work the at-line capillary-liquid chromatography-(microdispenser)-surface-enhanced Raman spectroscopy coupling was investigated and applied to the determination of pesticides. The use of a microdispenser combined with the use of a precise and reproducible surface enhanced Raman spectroscopy (SERS) substrate yielded a chromatographic detection system with excellent analytical properties. The microdispenser was coupled to a moving CaF2 hot (80 °C) plate using a flow-through microdispenser interface to collect the microdrops. Ag-QD nanocomposites, which are highly reproducible thanks to their sponge-shaped structure, were used as substrate with which to measure the SERS spectra in each spot of the plate. The limits of detection ranged from 0.2 to 0.5 ng of pesticide injected (chlortoluron, atrazine, diuron and terbuthylazine) and the precision ranged between 10.2 and 12.5%.
Keywords :
Sponge Silver-Quantum dots nanocomposite , surface-enhanced Raman scattering , Flow-through microdispenser , Capillary-liquid chromatography technique
Journal title :
Journal of Chromatography A
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Link To Document :