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Related Concept Videos

Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

513
A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
513
Raman Spectroscopy: Overview01:20

Raman Spectroscopy: Overview

506
The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
506

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Updated: Aug 22, 2025

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Fast Detection of Different Water Contaminants by Raman Spectroscopy and Surface-Enhanced Raman Spectroscopy.

Salvatore Almaviva1, Florinda Artuso1, Isabella Giardina1

  • 1ENEA, Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Frascati Research Center, Via Enrico Fermi 45, I-00040 Frascati, Italy.

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|November 11, 2022
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Summary

Raman and Surface-Enhanced Raman Spectroscopy (SERS) offer rapid, field-deployable water quality monitoring. This study demonstrates their effectiveness in detecting pollutants like nitrates, phosphates, and pesticides at low, regulatory-relevant concentrations.

Keywords:
Escherichia coliPAHsRaman spectroscopySERSpesticideswater pollution

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Area of Science:

  • Environmental Science
  • Analytical Chemistry
  • Spectroscopy

Background:

  • Fast water quality monitoring is crucial for environmental protection and public health.
  • Traditional methods can be slow or require extensive sample preparation.
  • Raman and Surface-Enhanced Raman Spectroscopy (SERS) offer rapid, field-portable analysis.

Purpose of the Study:

  • To apply Raman and SERS for the rapid detection of various water pollutants.
  • To evaluate the efficacy of the coffee-ring effect for analyte pre-concentration.
  • To demonstrate the capability of detecting contaminants at environmentally relevant concentrations.

Main Methods:

  • Utilized Raman spectroscopy and Surface-Enhanced Raman Spectroscopy (SERS).
  • Applied the coffee-ring effect for in-situ analyte pre-concentration without sample pretreatment.
  • Analyzed liquid samples contaminated with nitrates, phosphates, pesticides, and polycyclic aromatic hydrocarbons (PAHs).

Main Results:

  • Successfully detected multiple classes of water pollutants, including nitrates, phosphates, and pesticides.
  • Demonstrated the detection of the air pollutant benzo(a)pyrene using SERS.
  • Achieved detection limits at or below regulatory limits for the studied analytes.
  • Validated the coffee-ring effect as an effective pre-concentration technique.

Conclusions:

  • Raman and SERS, coupled with the coffee-ring effect, provide a versatile and rapid method for water pollutant detection.
  • This approach enables fast, in-situ environmental monitoring essential for risk assessment and management.
  • The technique shows promise for routine environmental analysis and safeguarding water resources.