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Related Concept Videos

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.
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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: Introduction01:13

Gas Chromatography: Introduction

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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).
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Gas Chromatography: Sample Injection Systems01:08

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In gas chromatography, the sample is introduced as a vapor plug into the carrier gas stream for high efficiency and resolution. A microsyringe injects the sample solution into a heated sample port, vaporizing it and mixing it with the carrier gas. This process is important to ensure the sample is properly prepared for analysis. Thermally sensitive samples can be injected directly into the column and volatilized by slowly increasing the column temperature.
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Distillation: Vapor–Liquid Equilibria01:01

Distillation: Vapor–Liquid Equilibria

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Distillation is a separation technique that takes advantage of the boiling point properties of disparate elements in a mixture. To perform distillation, we begin by heating a miscible mixture of two liquids with a significant difference in boiling points (at least 20°C). As the solution heats up and reaches the bubble point of the more volatile component, some molecules of the more volatile component transition into the gas phase and travel upward into the condenser, which is a glass tube...
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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.
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Profiling Volatile Compounds in Blackcurrant Fruit using Headspace Solid-Phase Microextraction Coupled to Gas Chromatography-Mass Spectrometry
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Development of a Dispersive Liquid-Liquid Microextraction Method for Quantification of Volatile Compounds in Wines

Dinesha Katugampala Appuhamilage1, Rebecca E Jelley1, Emma Sherman2

  • 1School of Chemical Sciences, University of Auckland, 23 Symonds Street, Auckland 1010, New Zealand.

Metabolites
|February 25, 2025
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Summary

A new dispersive liquid-liquid microextraction (DLLME) method simplifies volatile compound analysis in wine using gas chromatography-mass spectrometry (GC-MS). This efficient technique enhances wine aroma profiling for researchers and industry.

Keywords:
D-optimal designDLLME methodGC-MSaromavolatile compoundswine

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Area of Science:

  • Analytical Chemistry
  • Food Science
  • Organic Chemistry

Background:

  • Wine analysis requires efficient methods for volatile compound identification.
  • Existing methods can be complex and costly.
  • Dispersive liquid-liquid microextraction (DLLME) offers a promising alternative.

Purpose of the Study:

  • To develop a straightforward, efficient, and cost-effective DLLME method.
  • To optimize DLLME for gas chromatography-mass spectrometry (GC-MS) analysis of wine volatiles.
  • To validate the method's analytical performance.

Main Methods:

  • Optimization of four critical parameters using a D-optimal design.
  • Extraction of targeted analytes from a 10 mL wine sample.
  • Assessment of analytical characteristics with 36 target compounds.
  • Application to analyze the aroma profile of 30 New Zealand Pinot noir (PN) wine samples.

Main Results:

  • Satisfactory linearity (correlation coefficients > 0.990).
  • Good intra- and inter-day repeatability (RSD < 10.3%).
  • Suitable recoveries from model (83-110%) and real matrices (80-120%).

Conclusions:

  • The developed DLLME-GC-MS method is efficient and cost-effective for wine volatile analysis.
  • The method provides reliable analytical performance for complex matrices.
  • This advancement aids industry and researchers in exploring wine aroma profiles.