Attomole Detection of Glyphosate by Surface-Enhanced Raman Spectroscopy Using Gold Nanorods

Hilal TORUL*, İsmail Hakkı BOYACI**, Uğur TAMER*^,º
* Department of Analytical Chemistry, Faculty of Pharmacy, Gazi University, Ankara, Turkey
** Department of Food Engineering, Hacettepe University, Ankara, Turkey

° Corresponding Author E-mail: utamer@gazi.edu.tr

Summary

Surface-enhanced Raman spectroscopy (SERS) was used for the detection of glyphosate using gold nanorods derivatized with 4- mercapto phenylboronic acid. Since the introduction of the SERS, nanomaterials have been of significant interest as SERS substrates due to their tunable optical properties. The design and fabrication of a variety of nanomaterials with large SERS enhancement factor have been reported. Gold nanorod particle with controllable size and numerous surface functionalities can be easily synthesized and used as SERS substrates. SERS analysis of the glyphosate at different concentrations in the presence of gold nanorods was carried out and a calibration graph was drawn. According to this procedure, determination of glyphosate in tomato juice was carried out by using developed SERS substrate.

Key Words :
SERS, glyphosate, gold nanorods.