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Related Concept Videos

Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

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...
Gas Chromatography: Types of Detectors-II01:19

Gas Chromatography: Types of Detectors-II

In gas chromatography, different detectors are employed to meet specific analytical needs. These detectors are often categorized based on their detection mechanisms and the types of compounds they are best suited to analyze. Thermal Conductivity Detectors (TCD), Flame Ionization Detectors (FID), and Electron Capture Detectors (ECD) represent common categories, each with unique operating principles and applications. However, beyond these, several other detectors are designed for more specialized...
Raman Spectroscopy: Overview01:20

Raman Spectroscopy: Overview

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 the...

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Preparation and Application of a New Bacterial Biosensor for the Presumptive Detection of Gunshot Residue
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Portable Raman explosives detection.

David S Moore1, R Jason Scharff

  • 1Shock and Detonation Physics Group, Los Alamos National Laboratory, Los Alamos, NM 87545, USA. moored@lanl.gov

Analytical and Bioanalytical Chemistry
|November 22, 2008
PubMed
Summary
This summary is machine-generated.

Portable Raman spectroscopy offers advanced field capabilities for explosives detection. This review covers essential and instrumental aspects for emergency response and homeland defense applications.

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Area of Science:

  • Analytical Chemistry
  • Spectroscopy
  • Forensic Science

Background:

  • Portable Raman spectroscopy has advanced significantly.
  • Applications are increasing in emergency response, forensics, and homeland defense.

Purpose of the Study:

  • To review the attributes and disadvantages of portable Raman spectroscopy for field explosives detection.
  • To assess both essential and instrumental factors.

Main Methods:

  • Literature review of portable Raman spectroscopy applications.
  • Analysis of instrumental and essential characteristics relevant to explosives detection.

Main Results:

  • Portable Raman instruments show promise for field use.
  • Essential and instrumental factors present both advantages and disadvantages.

Conclusions:

  • Portable Raman spectroscopy is a valuable tool for field explosives detection.
  • Understanding instrument and essential limitations is crucial for effective deployment.