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Related Concept Videos

Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

295
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...
295
Raman Spectroscopy: Overview01:20

Raman Spectroscopy: Overview

301
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...
301

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Updated: Jun 2, 2025

A Filter-based Surface Enhanced Raman Spectroscopic Assay for Rapid Detection of Chemical Contaminants
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Surface-Enhanced Raman Spectroscopy for Nitrite Detection.

Dongchang Yang1, Brian Youden2, Naizhen Yu1

  • 1Department of Chemistry, Cape Breton University, Sydney, Nova Scotia B1P 6L2, Canada.

Journal of Agricultural and Food Chemistry
|January 14, 2025
PubMed
Summary
This summary is machine-generated.

Surface-enhanced Raman spectroscopy (SERS) offers a rapid, sensitive, and portable method for detecting nitrite, a crucial yet potentially toxic chemical. This review highlights SERS

Keywords:
AgricultureDiagnosticsFoodNanoparticlesNitriteSensingSurface-enhanced Raman spectroscopy

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Area of Science:

  • Analytical Chemistry
  • Environmental Science
  • Biochemistry

Background:

  • Nitrite is a key nitrogen cycle intermediate found in environmental and biological systems.
  • It serves as a metabolite and additive in agriculture and food industries.
  • Excessive nitrite concentrations can be toxic, necessitating accurate measurement methods.

Purpose of the Study:

  • To review the principles and applications of SERS for nitrite detection.
  • To showcase SERS' utility in analyzing water, food, and biological samples.
  • To discuss future challenges and opportunities in SERS-based nitrite analysis.

Main Methods:

  • Surface-Enhanced Raman Spectroscopy (SERS) is explored as a detection technique.
  • The review covers working principles and practical applications of SERS.
  • Various sample matrices including water, food, and biological systems are considered.

Main Results:

  • SERS provides a rapid, portable, and ultrasensitive approach for nitrite detection.
  • The technique demonstrates applicability across diverse sample types.
  • The review synthesizes current findings on SERS for nitrite analysis.

Conclusions:

  • SERS is a promising technology for on-site and real-time nitrite monitoring.
  • Further development can enhance SERS capabilities for environmental and health safety.
  • Addressing current challenges will expand SERS applications in nitrite detection.