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Related Concept Videos

Gas Chromatography: Types of Detectors-II01:19

Gas Chromatography: Types of Detectors-II

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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...
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Gas Chromatography: Types of Detectors-I01:21

Gas Chromatography: Types of Detectors-I

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There are different types of detectors used in gas chromatography, each with its own specific properties that make it suitable for detecting certain types of analytes. The most commonly used detectors in GC are thermal conductivity detector (TCD), flame ionization detector (FID), and electron capture detector (ECD).
TCD is the earliest and most widely used detector that operates by measuring the changes in the thermal conductivity of the carrier gas. When a sample compound enters the detector,...
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Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

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The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
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Atomic Emission Spectroscopy: Overview01:20

Atomic Emission Spectroscopy: Overview

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Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...
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Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

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AES is a powerful analytical technique, especially effective when used with plasma sources, producing abundant spectra in characteristic emission lines. The Inductively Coupled Plasma (ICP), in particular, yields superior quantitative analytical data due to its high stability, low noise, low background, and minimal interferences under optimal experimental conditions. However, newer air-operated microwave sources are emerging as promising alternatives that could be more cost-effective than...
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Tandem Mass Spectrometry01:21

Tandem Mass Spectrometry

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Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and signal-to-noise ratio for the analyte. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.
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Related Experiment Video

Updated: Dec 12, 2025

Quantitative Detection of Trace Explosive Vapors by Programmed Temperature Desorption Gas Chromatography-Electron Capture Detector
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Recent Developments in the Field of Explosive Trace Detection.

Ka Chuen To1, Sultan Ben-Jaber2, Ivan P Parkin1

  • 1Department of Chemistry, University College London, 20 Gordon Street, Bloomsbury, London WC1H 0AJ, United Kingdom.

ACS Nano
|August 14, 2020
PubMed
Summary

This review covers the latest advances in explosive trace detection (ETD) technologies, including animal olfactory, spectrometry, and sensor developments. It highlights current systems, challenges, and emerging multimodal approaches for enhanced national security.

Keywords:
IMSRaman spectroscopySERSartificial intelligenceexplosives’ detectionnanomaterialsquantum dotssensors

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Area of Science:

  • Analytical Chemistry
  • Materials Science
  • Biotechnology

Background:

  • Explosive trace detection (ETD) is critical for national security.
  • Numerous analytical techniques are currently in operational use for ETD.
  • ETD remains an active and evolving research field.

Purpose of the Study:

  • To provide a comprehensive overview of current ETD technologies.
  • To highlight recent advances and emerging trends in the field.
  • To discuss the principles, advantages, and limitations of various detection methods.

Main Methods:

  • Review of animal olfactory detection.
  • Analysis of ion mobility spectrometry (IMS).
  • Examination of Raman and colorimetric detection methods.
  • Inclusion of optical, biological, electrochemical, mass, and thermal sensors.
  • Assessment of nanomaterials technology in ETD.
  • Presentation of commercially available ETD systems.
  • Discussion of multimodal screening approaches.

Main Results:

  • Details the latest advancements across diverse ETD technologies.
  • Presents commercial systems as benchmarks for current capabilities.
  • Highlights collaborative projects driving innovation.
  • Identifies challenges and opportunities in ETD.

Conclusions:

  • Emerging multimodal screening approaches are gaining traction.
  • Understanding the principles and limitations of each technology is key.
  • Continued research and collaboration are essential for improving ETD capabilities.