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Sensitive detection of polycyclic aromatic hydrocarbons with gold colloid coupled chloride ion SERS sensor.

Authors
  • Gong, Xuegang1
  • Liao, Xiaoyong2
  • Li, You2
  • Cao, Hongying2
  • Zhao, Yishu2
  • Li, Haonan1
  • Cassidy, Daniel P3
  • 1 Key Laboratory of Land Surface Pattern and Simulation, Beijing Key Laboratory of Environmental Damage Assessment and Remediation, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China. [email protected] and University of Chinese Academy of Sciences, Beijing 100049, China. , (China)
  • 2 Key Laboratory of Land Surface Pattern and Simulation, Beijing Key Laboratory of Environmental Damage Assessment and Remediation, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China. [email protected] , (China)
  • 3 Department of Geological & Environmental Sciences, Western Michigan University, Kalamazoo 49008-5241, USA.
Type
Published Article
Journal
The Analyst
Publisher
The Royal Society of Chemistry
Publication Date
Nov 21, 2019
Volume
144
Issue
22
Pages
6698–6705
Identifiers
DOI: 10.1039/c9an01540j
PMID: 31599884
Source
Medline
Language
English
License
Unknown

Abstract

A simple surface-enhanced Raman spectroscopy (SERS) sensor based on an undecorated gold-colloid substrate was developed for the rapid and effective detection of polycyclic aromatic hydrocarbons (PAH). The SERS enhancement of the bare Au nanoparticles for PAH was achieved by adjusting chemical reduction conditions and Cl- content. The strongest SERS response of this system was achieved with 2.0 mL of trisodium citrate (1%) and 80 μL of NaCl (1 M). With this simple SERS sensor, qualitative and quantitative determination of trace-level naphthalene (NaP), phenanthrene (PHE) and pyrene (PYR) were achieved using a portable Raman spectrometer at detection limits of 1.38 μg L-1, 0.23 μg L-1, and 0.45 μg L-1, respectively. Plots of SERS intensity vs. PAH concentrations were linear, with correlation coefficients (R2) ranging from 0.8729 to 0.9994. More importantly, the SERS sensor was able to accurately identify each PAH in complex mixtures. This SERS technique shows great promise for the rapid and direct detection of aromatic hydrocarbons organic pollutants in field.

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