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Related Concept Videos

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,...
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...
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...
Gas Chromatography: Introduction01:13

Gas Chromatography: Introduction

Gas chromatography (GC) is a technique for separating and analyzing volatile compounds in a sample. Its primary purpose is to identify and quantify components in complex mixtures, making it essential in fields such as environmental analysis, pharmaceuticals, and petrochemicals. GC is also called vapor-phase chromatography (VPC) or gas-liquid partition chromatography (GLPC).
In GC,  a sample is vaporized and mixed with an inert carrier gas (the mobile phase), which transports it through a column.
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...
High-Performance Liquid Chromatography: Types of Detectors01:15

High-Performance Liquid Chromatography: Types of Detectors

The role of the detectors in High-Performance Liquid Chromatography (HPLC) is to analyze the solutes as they exit from the chromatographic column. The detector recognizes the solute's property and generates corresponding electrical signals, which are converted into a readable graph of the detector's response versus elution time called a chromatogram at the computer. There are several types of HPLC detectors, each with its own advantages and limitations, depending on the analyte properties and...

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Updated: Jul 18, 2026

Chromatographic Fingerprinting by Template Matching for Data Collected by Comprehensive Two-Dimensional Gas Chromatography
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Chromatographic Fingerprinting by Template Matching for Data Collected by Comprehensive Two-Dimensional Gas Chromatography

Published on: September 2, 2020

Studies on thermionic ionisation detection in comprehensive two-dimensional gas chromatography.

Danielle Ryan1, Philip Marriott

  • 1School of Applied Sciences, RMIT University, Melbourne, Victoria, Australia.

Journal of Separation Science
|November 24, 2006
PubMed
Summary

This study introduces gas chromatography-nitrogen phosphorus detection (GC x GC-NPD) for complex samples. Optimized detector gas flows are crucial for sensitive and selective analysis of nitrogen compounds.

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On-line Analysis of Nitrogen Containing Compounds in Complex Hydrocarbon Matrixes
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On-line Analysis of Nitrogen Containing Compounds in Complex Hydrocarbon Matrixes

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Chromatographic Fingerprinting by Template Matching for Data Collected by Comprehensive Two-Dimensional Gas Chromatography
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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

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On-line Analysis of Nitrogen Containing Compounds in Complex Hydrocarbon Matrixes
07:49

On-line Analysis of Nitrogen Containing Compounds in Complex Hydrocarbon Matrixes

Published on: August 5, 2016

Area of Science:

  • Analytical Chemistry
  • Chromatography

Background:

  • Comprehensive two-dimensional gas chromatography (GC x GC) generates narrow peaks, demanding detectors with fast response times and minimal asymmetry.
  • Nitrogen phosphorus detection (NPD) is a selective detector for nitrogen-containing compounds.

Purpose of the Study:

  • To report the first application of GC x GC with nitrogen phosphorus detection (GC x GC-NPD).
  • To evaluate the performance of GC x GC-NPD regarding peak asymmetry and sensitivity.
  • To optimize detector gas flows for improved peak shape and magnitude in GC x GC-NPD.

Main Methods:

  • Application of thermionic ionisation detection (NPD) in a GC x GC system.
  • Systematic variation of detector gas flows to assess impact on peak parameters.
  • Comparative analysis of GC x GC-NPD with GC x GC-flame ionisation detection (FID) and GC x GC-time-of-flight mass spectrometry (TOFMS).

Main Results:

  • Detector gas flows significantly influenced peak asymmetry (As = 1.8 to 8.0) and magnitude.
  • GC x GC-NPD demonstrated approximately 20-fold higher sensitivity for nitrogen-containing methoxypyrazines compared to GC x GC-FID.
  • GC x GC-NPD exhibited a larger linear detection range than GC x GC-FID.
  • Selective detection with GC x GC-NPD simplified chromatograms for coffee headspace analysis.

Conclusions:

  • Optimization of detector gas flows is critical for successful GC x GC-NPD analysis.
  • GC x GC-NPD offers enhanced sensitivity and selectivity for specific analytes.
  • GC x GC-NPD provides a valuable tool for analyzing complex samples, simplifying data interpretation.