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Related Concept Videos

Mass Spectrometry: Complex Analysis01:21

Mass Spectrometry: Complex Analysis

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Mass spectrometry is an important technique for the identification of pure compounds. However, it has some limitations for the analysis of complex mixtures, often due to excessive fragmentation making the spectrum too complicated to decipher. Mass spectrometry can be combined with suitable separation methods in sequence, forming hyphenated methods, which are useful in the analysis of complex mixtures.
GC–MS is a powerful hyphenated method commonly used in forensics and environmental...
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Gas Chromatography–Mass Spectrometry (GC–MS)01:14

Gas Chromatography–Mass Spectrometry (GC–MS)

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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....
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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 reduce chemical noise during analyte detection. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.Secondary fragmentations occur in the interaction cell and can be induced by various factors. Fragmentation induced by collision with inert gases, such as N2, Ar, He, etc., is called...
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Inductively Coupled Plasma–Mass Spectrometry (ICP–MS): Overview01:19

Inductively Coupled Plasma–Mass Spectrometry (ICP–MS): Overview

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In inductively coupled plasma–mass spectrometry (ICP–MS), an inductively coupled plasma (ICP) torch is used as an atomizer and ionizer. Solid samples are dissolved and volatilized before being introduced into the high-temperature argon plasma, while solution samples are nebulized and passed through the high-temperature argon plasma. Plasma dissociates the analytes and ionizes their component atoms to form a mixture of positive ions and molecular species. The positive ions are then...
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Mass Analyzers: Common Types01:19

Mass Analyzers: Common Types

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The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...
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Mass Spectrometers01:16

Mass Spectrometers

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This lesson details the instrumentation of a mass spectrometer—a physical instrument to perform mass spectrometry on analyte molecules and record the characteristic mass spectra. This is achieved via three chief functions:
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Related Experiment Video

Updated: Mar 3, 2026

Sample Preparation for Probe Electrospray Ionization Mass Spectrometry
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Sample Preparation for Probe Electrospray Ionization Mass Spectrometry

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Open Probe fast GC-MS - combining ambient sampling ultra-fast separation and in-vacuum ionization for real-time

U Keshet1, T Alon1, A B Fialkov1

  • 1School of Chemistry, Tel Aviv University, Tel Aviv, 69978, Israel.

Journal of Mass Spectrometry : JMS
|April 30, 2017
PubMed
Summary

This study introduces an Open Probe fast gas chromatograph-mass spectrometer (GC-MS) for rapid, real-time chemical analysis. The system achieves ~30-second separations and full analysis cycles in under a minute for diverse samples.

Keywords:
Open ProbeOpen Probe fast GC-MSdirect analysis in real timegas chromatography mass spectrometryorganic surface analysisreal-time analysis

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Area of Science:

  • Analytical Chemistry
  • Chemical Analysis
  • Spectrometry

Background:

  • Traditional gas chromatography-mass spectrometry (GC-MS) can be time-consuming.
  • Real-time analysis with high separation efficiency is desirable for many applications.

Purpose of the Study:

  • To develop and demonstrate a novel Open Probe fast gas chromatograph-mass spectrometer (GC-MS) system.
  • To achieve rapid, real-time chemical analysis with GC separation capabilities.

Main Methods:

  • Combined an Open Probe inlet with an ultra-fast GC and a low thermal mass MS.
  • Utilized ambient sampling with sample vaporization in an open oven.
  • Integrated with a standard Agilent 7890 GC and 5977A MS system.

Main Results:

  • Achieved ~30-second GC separations and <1-minute full analysis cycles for various compounds.
  • Demonstrated real-time analysis of cannabinoids, explosives, vitamins, sterols, flame retardants, pharmaceuticals, and fatty acids.
  • Showcased sub-10-second analysis without separation for specific analytes.
  • Extrapolated limit of detection for pyrene <1 fg, though software limitations were noted.

Conclusions:

  • The Open Probe fast GC-MS system offers a powerful solution for rapid, real-time chemical analysis.
  • The system provides GC separation and library identification capabilities with low-cost MS.
  • Its versatility is demonstrated across a wide range of complex samples and analytes.