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Related Concept Videos

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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Sample Preparation for Analysis: Advanced Techniques01:08

Sample Preparation for Analysis: Advanced Techniques

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Accurate analysis of complex samples often requires advanced preparation techniques to achieve reliable and reproducible results. Samples containing inorganic or organic materials can be challenging to dissolve or decompose effectively. Standard sample preparation methods include acid digestion, fusion, dry ashing, and wet digestion.
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High-Performance Liquid Chromatography: Elution Process01:05

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In High-Performance Liquid Chromatography (HPLC), the elution process is critical to the separation of analytes and the quality of chromatographic results. Elution describes how compounds move through the column and separate based on their interactions with the mobile and stationary phases. This process determines the resolution, peak shape, and retention times in the chromatogram, which are essential for identifying and quantifying components in complex mixtures. Understanding the elution...
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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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Sample Preparation for Analysis: Overview01:21

Sample Preparation for Analysis: Overview

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Sample preparation is an essential step in the analytical process. It involves preparing a sample so that it can be analyzed accurately. The goal is to extract the analyte, the substance you want to measure, from the sample while removing any components that may interfere with the analysis. Sample preparation techniques vary depending on the physical state of the sample.
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Size-Exclusion Chromatography01:08

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In size-exclusion chromatography (SEC), also known as molecular-exclusion or gel-permeation chromatography, molecules are separated based on their sizes. This technique is important for separating large molecules such as polymers and biomolecules. The two classes of micron-sized stationary phases encountered in SEC are silica particles and cross-linked polymer resin beads. Both materials are porous, but their pore sizes vary significantly.
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Related Experiment Video

Updated: Dec 19, 2025

Profiling Volatile Compounds in Blackcurrant Fruit using Headspace Solid-Phase Microextraction Coupled to Gas Chromatography-Mass Spectrometry
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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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Enhancement of volatile profiling using multiple-cumulative trapping solid-phase microextraction. Consideration on

Steven Mascrez1, Giorgia Purcaro1

  • 1Gembloux Agro-Bio Tech, University of Liège, Gembloux, 5030, Belgium.

Analytica Chimica Acta
|June 7, 2020
PubMed
Summary
This summary is machine-generated.

This study optimized multiple-cumulative trapping headspace solid-phase microextraction for olive oil analysis. Using less sample (0.1g) with this technique significantly enhanced fingerprinting information for quality assessment.

Keywords:
Headspace solid-phase microextractionMultiple-cumulative trapping headspace solid-phase microextractionOlive oilPattern recognitionSample volume

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Area of Science:

  • Analytical Chemistry
  • Food Science

Background:

  • Solid-phase microextraction (SPME) is crucial for analyzing volatile compounds.
  • Optimizing SPME parameters is key to maximizing information for quality control.

Purpose of the Study:

  • To compare multiple-cumulative trapping headspace SPME performance.
  • To maximize fingerprinting information for olive oil quality assessment using cross-sample comparison algorithms.

Main Methods:

  • Investigated headspace linearity range and saturated headspace conditions.
  • Evaluated the impact of sample volume (0.1g vs. 1.5g) on profiling.
  • Utilized multiple-cumulative trapping headspace SPME.

Main Results:

  • 0.1g of olive oil yielded comparable or better profiling than 1.5g.
  • Multiple-cumulative trapping SPME improved overall sensitivity.
  • Significantly increased information content for cross-sample studies.

Conclusions:

  • Optimized sample volume and multiple-cumulative trapping SPME enhance olive oil fingerprinting.
  • This approach offers a more informative method for olive oil quality assessment.
  • The technique provides a cost-effective and sensitive analytical solution.