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Related Concept Videos

Gas Chromatography–Mass Spectrometry (GC–MS)01:14

Gas Chromatography–Mass Spectrometry (GC–MS)

Gas chromatography–mass spectrometry (GC–MS) is the combination of analytical techniques of gas chromatography and mass spectrometry in a single instrument for analyzing a mixture of compounds. The gas chromatograph separates the compounds in the mixture, and the mass spectrometer analyzes each compound separately to determine the molecular masses and molecular structures.
A gas chromatograph consists of a long, narrow capillary column with a polysiloxane coating on the inner wall. The coating...
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...
Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.
Gas Chromatography: Overview of Detectors01:13

Gas Chromatography: Overview of Detectors

Detectors in gas chromatography (GC) help identify and quantify the components of a mixture by translating chemical properties into measurable signals, which are displayed on a chromatogram. Detectors can be categorized into two main types: destructive and non-destructive.
A non-destructive detector allows a sample to be analyzed without altering or consuming it, meaning the sample can be collected after detection for further analysis. Examples include thermal conductivity detectors and...
Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

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

Gas Chromatography: Types of Detectors-I

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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Updated: Jun 16, 2026

Quantitative Detection of Trace Explosive Vapors by Programmed Temperature Desorption Gas Chromatography-Electron Capture Detector
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Quantitative Detection of Trace Explosive Vapors by Programmed Temperature Desorption Gas Chromatography-Electron Capture Detector

Published on: July 25, 2014

Gas cell correlation spectrometer: GASPEC.

T V Ward, H H Zwick

    Applied Optics
    |February 16, 2010
    PubMed
    Summary
    This summary is machine-generated.

    A novel Gas Filter Correlation Spectrometer (GASPEC) enables remote atmospheric vapor detection using infrared (IR) natural emissions. This innovative instrument offers continuous calibration and accurate gas sensing for methane and other trace gases.

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    Quantitative Detection of Trace Explosive Vapors by Programmed Temperature Desorption Gas Chromatography-Electron Capture Detector
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    Published on: October 29, 2018

    Area of Science:

    • Atmospheric science
    • Spectroscopy
    • Environmental monitoring

    Background:

    • Remote sensing of atmospheric trace vapors is crucial for environmental monitoring.
    • Existing methods may lack continuous calibration and real-time data acquisition.
    • Infrared (IR) spectroscopy offers a non-invasive approach for gas detection.

    Purpose of the Study:

    • To introduce a new Gas Filter Correlation Spectrometer (GASPEC) for remote atmospheric trace vapor detection.
    • To highlight the unique optical design features that enable continuous sensor balance and calibration.
    • To present preliminary data demonstrating the instrument's capability for sensing various gases.

    Main Methods:

    • Development of a Gas Filter Correlation Spectrometer (GASPEC) utilizing natural IR emissions.
    • Incorporation of unique optical features: dual detectors with a single focal plane chopper and an optical reference.
    • Implementation of electronic gain balancing for continuous sensor performance.
    • Testing of GASPEC instruments for sensing methane (CH4), ethane (C2H6), hydrogen chloride (HCl), and carbon monoxide (CO).

    Main Results:

    • The GASPEC design facilitates continuous sensor balance and calibration.
    • The instrument provides simultaneous source radiometric and target gas information.
    • Preliminary data confirm the successful detection of CH4, C2H6, HCl, and CO.
    • The system demonstrates effective remote sensing of trace vapors in the atmosphere.

    Conclusions:

    • The developed GASPEC is a viable technology for remote atmospheric gas sensing.
    • Its unique optical design ensures reliable and continuous performance.
    • The instrument shows promise for monitoring various trace gases in the atmosphere.