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Updated: May 16, 2026
08:13
A Filter-based Surface Enhanced Raman Spectroscopic Assay for Rapid Detection of Chemical Contaminants
Published on: February 19, 2016
[Detection and analysis of polycyclic aromatic hydrocarbons using surface-enhanced Raman spectroscopy]
Jun Ma1, Shu Liu, Xiao-Feng Shi
1Optics & Optoelectronics Laboratory, Ocean University of China, Qingdao 266100, China. majun@ouc.edu.cn
Guang Pu Xue Yu Guang Pu Fen Xi = Guang Pu
|December 18, 2012
Summary
This study introduces optimized gold nanoparticles as a surface-enhanced Raman scattering (SERS) substrate for detecting trace levels of polycyclic aromatic hydrocarbons (PAHs) in water with high sensitivity.
Area of Science:
- Nanomaterials Science
- Analytical Chemistry
- Spectroscopy
Context:
- Polycyclic Aromatic Hydrocarbons (PAHs) are significant environmental pollutants.
- Trace detection of PAHs in water is crucial for environmental monitoring.
- Surface-Enhanced Raman Scattering (SERS) offers high sensitivity for molecular detection.
Purpose:
- To develop and optimize gold nanoparticles as a SERS-active substrate.
- To achieve sensitive and selective detection of PAHs in aqueous solutions.
- To establish a novel method for trace PAH analysis in water.
Summary:
- Optimized gold nanoparticles (32 ± 3 nm) were synthesized and utilized as SERS substrates.
- The SERS method demonstrated high sensitivity for detecting naphthalene, phenanthrene, and pyrene down to 4 nmol/L.
- Optimal detection was achieved at pH 13, with a 20-fold intensity increase compared to pH 6.
- Distinct characteristic peaks allowed for easy differentiation of individual PAHs in mixtures.
- A linear correlation (R² > 0.985) was observed between peak intensity and PAH concentration.
Impact:
- This work presents a novel, highly sensitive SERS-based approach for trace PAH detection in water.
- The optimized gold colloid substrate shows excellent application prospects for environmental monitoring.
- This method facilitates the identification and quantification of individual PAHs in complex mixtures.
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