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Related Concept Videos

Mass Spectrum01:23

Mass Spectrum

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A mass spectrum is the graphical representation of the relative abundance of the charged fragments in an analyte plotted against their mass-to-charge ratio (m/z). The plot's x-axis represents the ratio of the mass of the charged fragment to the number of charges it carries. The y axis of the plot represents the relative abundance of each charged species. The relative abundance is calculated from the signal intensity of each charged species recorded at the detector. The most intense signal (the...
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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...
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Gas Chromatography: Types of Detectors-I01:21

Gas Chromatography: Types of Detectors-I

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There are different types of detectors used in gas chromatography, each with its own specific properties that make it suitable for detecting certain types of analytes. The most commonly used detectors in GC are thermal conductivity detector (TCD), flame ionization detector (FID), and electron capture detector (ECD).
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Measuring Dissolved Methane in Aquatic Ecosystems Using An Optical Spectroscopy Gas Analyzer
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Field Test of a Remote Multi-Path CLaDS Methane Sensor.

Genevieve Plant1, Michal Nikodem2,3, Phil Mulhall4

  • 1Electrical Engineering Department, Princeton University, Princeton, NJ 08544, USA. gplant@princeton.edu.

Sensors (Basel, Switzerland)
|September 8, 2015
PubMed
Summary

This study introduces a remote, multi-path Chirped Laser Dispersion Spectroscopy (CLaDS) system for measuring methane. This technology enables large-area environmental monitoring, particularly for wetland methane emissions.

Keywords:
laser spectroscopyoptical dispersion spectroscopyremote sensing

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Area of Science:

  • Environmental Science
  • Atmospheric Chemistry
  • Spectroscopy

Background:

  • Current methane emission quantification methods rely on single-point sensors, limiting large-scale environmental monitoring.
  • Accurate measurement of atmospheric methane is crucial for understanding climate change and environmental impact.

Purpose of the Study:

  • To demonstrate a novel remote, multi-path system for quantifying atmospheric methane concentrations over extended areas.
  • To assess the potential of Chirped Laser Dispersion Spectroscopy (CLaDS) for monitoring wetland methane emissions.

Main Methods:

  • Development and operation of a remote, multi-path sensing system.
  • Utilizing Chirped Laser Dispersion Spectroscopy (CLaDS) for methane quantification.
  • Testing the system's capability for large-area atmospheric measurements.

Main Results:

  • Successful demonstration of a remote, multi-path CLaDS system for methane quantification.
  • The system effectively measures atmospheric methane concentrations over extended areas.
  • The technology shows promise for monitoring emissions from environmental sources like wetlands.

Conclusions:

  • The developed CLaDS system overcomes limitations of single-point sensors for methane quantification.
  • This remote sensing technology offers a viable solution for large-area environmental monitoring.
  • The system has significant potential for applications in wetland methane emission studies.