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Related Concept Videos

Mass Spectrometry: Complex Analysis01:21

Mass Spectrometry: Complex Analysis

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...
¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)01:20

¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)

When proton-coupled carbon-13 spectra are simplified by a broadband proton decoupling technique, structural information about the coupled protons is lost. Distortionless enhancement by polarization transfer (DEPT) is a technique that provides information on the number of hydrogens attached to each carbon in a molecule. While the DEPT experiment utilizes complex pulse sequences, the pulse delay and flip angle are specifically manipulated. The resulting signals have different phases depending on...
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...
2D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)01:19

2D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)

Heteronuclear single-quantum correlation spectroscopy (HSQC) is a 2D NMR technique that reveals one-bond correlations between hydrogen and a heteronucleus. The HSQC experiment is similar to the heteronuclear correlation experiment (HETCOR) but is more sensitive. In the HSQC spectrum, the proton chemical shift is plotted on the horizontal F2 axis, while the 13C chemical shift is plotted on the vertical F1 axis. The corresponding proton and 13C spectra are also shown. The HSQC contour plot does...
2D NMR: Overview of Heteronuclear Correlation Techniques01:18

2D NMR: Overview of Heteronuclear Correlation Techniques

Heteronuclear correlation spectroscopy is an analytical technique that investigates the coupling between different types of nuclei, often a proton and an X-nucleus, such as carbon-13 or nitrogen-15. This method is commonly used in nuclear magnetic resonance (NMR) spectroscopy to gain insights into complex chemical compounds' structural and compositional aspects. A typical heteronuclear correlation spectrum displays X-nucleus chemical shifts on one axis and a proton spectrum on the other axis.
IR Spectroscopy: Hooke's Law Approximation of Molecular Vibration01:16

IR Spectroscopy: Hooke's Law Approximation of Molecular Vibration

A covalently bonded heteronuclear diatomic molecule can be modeled as two vibrating masses connected by a spring. The vibrational frequency of the bond can be expressed using an equation derived from Hooke's law, which describes how the force applied to stretch or compress a spring is proportional to the displacement of the spring. In this case, the atoms behave like masses, and the bond acts like a spring.
According to Hooke's law, the vibrational frequency is directly proportional to the...

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Related Experiment Video

Updated: May 27, 2026

Methane Hydrate Crystallization on Sessile Water Droplets
08:46

Methane Hydrate Crystallization on Sessile Water Droplets

Published on: May 26, 2021

Spectroscopic methods in gas hydrate research.

Florian Rauh1, Boris Mizaikoff

  • 1Institute of Analytical and Bioanalytical Chemistry, University of Ulm, Ulm, Germany.

Analytical and Bioanalytical Chemistry
|November 19, 2011
PubMed
Summary
This summary is machine-generated.

Spectroscopic techniques are crucial for understanding gas hydrate formation and dissociation. These methods reveal molecular-level details vital for energy resources and CO2 storage applications.

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Protocol for Measuring the Thermal Properties of a Supercooled Synthetic Sand-water-gas-methane Hydrate Sample
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Protocol for Measuring the Thermal Properties of a Supercooled Synthetic Sand-water-gas-methane Hydrate Sample

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A Microfluidic Approach for the Study of Ice and Clathrate Hydrate Crystallization
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A Microfluidic Approach for the Study of Ice and Clathrate Hydrate Crystallization

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Related Experiment Videos

Last Updated: May 27, 2026

Methane Hydrate Crystallization on Sessile Water Droplets
08:46

Methane Hydrate Crystallization on Sessile Water Droplets

Published on: May 26, 2021

Protocol for Measuring the Thermal Properties of a Supercooled Synthetic Sand-water-gas-methane Hydrate Sample
09:46

Protocol for Measuring the Thermal Properties of a Supercooled Synthetic Sand-water-gas-methane Hydrate Sample

Published on: March 21, 2016

A Microfluidic Approach for the Study of Ice and Clathrate Hydrate Crystallization
08:01

A Microfluidic Approach for the Study of Ice and Clathrate Hydrate Crystallization

Published on: August 18, 2022

Area of Science:

  • Geochemistry and Materials Science
  • Focus on crystalline structures and molecular interactions.

Background:

  • Gas hydrates, naturally occurring in deep-sea and permafrost environments, trap low molecular weight molecules like methane and carbon dioxide.
  • While hydrate composition and structure are known, formation/dissociation mechanisms and kinetics remain unclear.
  • Understanding these processes is key for utilizing gas hydrates as energy resources or for CO2 sequestration.

Purpose of the Study:

  • To review the importance of spectroscopic techniques in gas hydrate research.
  • To highlight how these methods provide molecular-level insights into hydrate structure and dynamics.
  • To showcase the utility of various spectroscopic techniques for in situ analysis.

Main Methods:

  • Spectroscopic techniques including Raman, solid-state nuclear magnetic resonance (NMR), UV-vis, and mid-infrared spectroscopy.
  • Diffraction methods (neutron and X-ray) for structural determination.
  • Scanning electron microscopy (SEM) for structural studies.

Main Results:

  • Spectroscopic methods are essential for analyzing gas hydrate composition, structure, cage occupancy, and guest molecule interactions.
  • Raman and solid-state NMR spectroscopy are commonly applied.
  • Mid-infrared spectroscopy shows promise for in situ studies of hydrate formation and dissociation.

Conclusions:

  • Spectroscopic techniques are indispensable for a detailed molecular-level understanding of gas hydrate systems.
  • These methods are critical for advancing applications such as methane hydrate energy extraction and CO2 storage.
  • Further research utilizing these techniques will elucidate complex hydrate dynamics.