Detection of rhodamine 6G in blood and urine using combination of surface-enhanced Raman spectroscopy and liquid-liquid extraction

Victoria V. Shalabay; Natalia E. Markina; Victor V. Galushka; Andrey M. Zakharevich; Alexey V. Markin; Irina Yu. Goryacheva

doi:10.1117/12.2269057

24 March 2017 Detection of rhodamine 6G in blood and urine using combination of surface-enhanced Raman spectroscopy and liquid-liquid extraction

Victoria V. Shalabay, Natalia E. Markina, Victor V. Galushka, Andrey M. Zakharevich, Alexey V. Markin, Irina Yu. Goryacheva

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Proceedings Volume 10336, Saratov Fall Meeting 2016: Optical Technologies in Biophysics and Medicine XVIII; 1033613 (2017) https://doi.org/10.1117/12.2269057
Event: Saratov Fall Meeting 2016: Fourth International Symposium on Optics and Biophotonics, 2016, Saratov, Russian Federation

Abstract

The aim of this report is detection of model compound, rhodamine 6G (R6G), in blood and urine samples using surfaceenhanced Raman spectroscopy (SERS) as a detection tool and liquid-liquid extraction (LLE) for improving quality of SERS analysis (SERS-LLE combination). SERS substrate is a plasmonic nanomaterial which possesses drastic increasing of Raman spectrum intensity (10⁶‒10⁸) of any molecule adsorbed onto its surface. Here we used citrate stabilized silver nanoparticles as SERS substrate and synthesized them applying wet chemical approach. Before SERS measurements, blood and urine samples were artificially contaminated with R6G using 50 and 500 ng/mL concentrations for both samples. In order to reduce detectable concentrations of R6G and improve signal-to-noise ratio, we applied LLE which allows us to separate R6G from the matrix mixture and increase the analyte concentration. Four different LLE protocols were used and the most efficient one was found. Obtained results showed usefulness of SERS-LLE combination for chemical analysis of body fluids with level of detectable concentration down to tens ng/mL.

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Victoria V. Shalabay, Natalia E. Markina, Victor V. Galushka, Andrey M. Zakharevich, Alexey V. Markin, and Irina Yu. Goryacheva "Detection of rhodamine 6G in blood and urine using combination of surface-enhanced Raman spectroscopy and liquid-liquid extraction", Proc. SPIE 10336, Saratov Fall Meeting 2016: Optical Technologies in Biophysics and Medicine XVIII, 1033613 (24 March 2017); https://doi.org/10.1117/12.2269057

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KEYWORDS

Surface enhanced Raman spectroscopy

Blood

Raman spectroscopy

Silver

Chemical analysis

Rhodamine

Nanoparticles

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