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Related Concept Videos

Chemical Ionization (CI) Mass Spectrometry01:21

Chemical Ionization (CI) Mass Spectrometry

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The molecular ion peak of a molecule in the mass spectrum provides vital information for molecular identification. However, conventional electron impact ionization can lead to the rapid dissociation of some molecular ions before they reach the detector. A milder ionization method is required to increase the lifetime of such ionized analyte molecules. Chemical ionization (CI) is a gas-phase protonation reaction useful for mass-analyzing analyte molecules that are easily protonated to yield the...
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Electrospray Ionization (ESI) Mass Spectrometry01:12

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Higher molecular weight biomolecules are nonvolatile compounds that may decompose before ionizing or vaporizing during mass analysis with conventional electron impact ionization methods. Accordingly, electrospray ionization (ESI) is the favored method for vaporizing and ionizing biomolecules as it circumvents rapid fragmentation and enables the recording of mass signals for the entire biomolecule.
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Atomic Absorption Spectroscopy: Atomization Methods01:25

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Atomic Absorption Spectroscopy (AAS) atomizes samples through flame atomization or electrothermal atomization. Flame atomization typically involves a nebulizer and spray chamber assembly to combine the sample with a fuel–oxidant mixture, creating a fine aerosol mist that enters a burner. Typically, the fuel and oxidant are combined in an approximately stoichiometric ratio. However, for atoms that are easily oxidized, a fuel-rich mixture may be more advantageous. Only about 5% of the...
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Volatilization01:10

Volatilization

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Volatilization gravimetry is an analytical technique that measures the mass lost due to the volatilization of the substance. This technique is used to estimate the amount of volatile material in a sample. To perform this method, heat a known amount of the sample to a high temperature in a crucible or other suitable vessel. The volatile substance in the sample evaporates, and the vapor is completely expelled from the crucible either by heating the sample or bubbling a stream of inert gas through...
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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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Mass Spectrometers01:16

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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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Updated: Jun 4, 2025

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Identification of Cherry Tomato Volatiles Using Different Electron Ionization Energy Levels.

Dalma Radványi1, László Csambalik2, Dorina Szakál1

  • 1Department of Hospitality, Faculty of Commerce, Hospitality and Tourism, Budapest Business University, 9-11 Alkotmány út, H-1054 Budapest, Hungary.

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|December 17, 2024
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Summary

This study analyzed volatile compounds in 11 cherry tomato pastes, identifying 59 compounds and discovering new ones. These volatiles can accurately classify different tomato varieties.

Keywords:
EIGC-MSHS-SPME-GC-MScherry tomatotomato volatilesunknown analysis

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Area of Science:

  • Food Chemistry
  • Analytical Chemistry
  • Agricultural Science

Background:

  • Volatile organic compounds significantly influence the aroma and flavor profiles of tomato products.
  • Understanding the chemical composition of cherry tomato pastes is crucial for quality control and product differentiation.

Purpose of the Study:

  • To comprehensively analyze the volatile profiles of 11 commercially available cherry tomato pastes.
  • To optimize solid-phase microextraction (SPME) conditions for accurate volatile compound analysis.
  • To identify key volatile compounds for discriminating between different cherry tomato varieties.

Main Methods:

  • Optimization of SPME parameters including fiber coating (CAR/PDMS), sampling temperature (60 °C), and extraction time (30 min).
  • Analysis of volatile components using gas chromatography-mass spectrometry (GC-MS).
  • Application of supervised and unsupervised classification methods for varietal discrimination based on volatile profiles.

Main Results:

  • A total of 64 volatile compounds were detected, with 59 successfully identified across 11 cherry tomato paste samples.
  • Several novel cherry tomato-related volatile compounds were identified, expanding the known chemical profile.
  • Sixteen key volatile components were determined to be highly effective in accurately classifying the different tomato varieties.

Conclusions:

  • The optimized SPME method provides reliable analysis of cherry tomato volatiles.
  • The identified volatile profile offers insights into the characteristic aromas of different cherry tomato varieties.
  • Volatile compound analysis is a powerful tool for the accurate classification and quality assessment of cherry tomato products.