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Related Concept Videos

Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

920
A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
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Raman Spectroscopy: Overview01:20

Raman Spectroscopy: Overview

1.2K
The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
1.2K
Gas Chromatography: Types of Detectors-II01:19

Gas Chromatography: Types of Detectors-II

1.0K
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...
1.0K
Gas Chromatography–Mass Spectrometry (GC–MS)01:14

Gas Chromatography–Mass Spectrometry (GC–MS)

6.3K
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....
6.3K
Gas Chromatography: Overview of Detectors01:13

Gas Chromatography: Overview of Detectors

1.7K
Detectors in gas chromatography (GC) help identify and quantify the components of a mixture by translating chemical properties into measurable signals, which are displayed on a chromatogram. Detectors can be categorized into two main types: destructive and non-destructive.
A non-destructive detector allows a sample to be analyzed without altering or consuming it, meaning the sample can be collected after detection for further analysis. Examples include thermal conductivity detectors and...
1.7K
Atomic Absorption Spectroscopy: Instrumentation01:22

Atomic Absorption Spectroscopy: Instrumentation

1.5K
An atomic absorption spectrophotometer (AAS) comprises several components: a radiation source, an atomizer, a monochromator, and a detector. The radiation source can be a hollow-cathode lamp (HCL) or an electrodeless-discharge lamp (EDL), both of which provide a narrow emission line of the required wavelength. However, some instruments use continuum sources and high-resolution monochromators to achieve a narrow range of radiation.
The atomizer used in AAS can be either a flame atomizer or an...
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Rejection of Fluorescence Background in Resonance and Spontaneous Raman Microspectroscopy
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Analysis of Natural Gas Using a Portable Hollow-Core Photonic Crystal Coupled Raman Spectrometer.

Maksim N Khannanov1, Alexander B Van'kov1, Andrei A Novikov2

  • 1Institute of Solid State Physics Russian Academy of Sciences, Chernogolovka, Russian Federation.

Applied Spectroscopy
|March 13, 2020
PubMed
Summary

Portable Raman spectroscopy offers precise, in situ analysis of natural gas composition, even for infrared-inactive gases like hydrogen and oxygen. This express method meets demands for analyzing natural gas and its mixtures in remote or pipeline settings.

Keywords:
HC-PCFRaman spectrometrycalibration gas mixturegas chromatographyhollow-core photonic crystal fibernatural gas

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Area of Science:

  • Analytical Chemistry
  • Spectroscopy
  • Materials Science

Background:

  • Natural gas analysis requires portable, precise, and in situ methods.
  • Existing techniques struggle with remote locations and infrared-inactive gases.

Purpose of the Study:

  • Develop an express method for natural gas analysis.
  • Meet requirements for analyzing natural gas and derivative mixtures.
  • Enable in situ analysis of infrared-inactive gases.

Main Methods:

  • Utilized a portable 532 nm Raman spectrometer.
  • Employed a hollow-core crystal photonic fiber.
  • Developed an express method for gas analysis.

Main Results:

  • Achieved nearly chromatographic precision.
  • Enabled in situ analysis of a wide range of gases.
  • Successfully analyzed natural gas and its derivative mixtures.

Conclusions:

  • The developed express method using Raman spectroscopy is suitable for natural gas analysis.
  • The portable system addresses the need for analyzing infrared-inactive gases in situ.
  • This technology enhances the accessibility and analysis of natural gas resources.