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Related Concept Videos

Atomic Absorption Spectroscopy: Instrumentation01:22

Atomic Absorption Spectroscopy: Instrumentation

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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.
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¹³C NMR: ¹H–¹³C Decoupling01:04

¹³C NMR: ¹H–¹³C Decoupling

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The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
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Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

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Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
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High-Resolution Mass Spectrometry (HRMS)01:15

High-Resolution Mass Spectrometry (HRMS)

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The resolution of a mass spectrometer depends on the efficiency of separating ions with different ion masses. The mass of an atom is approximated to the sum of the masses of protons and neutrons inside, considering the masses of protons and neutrons as equal. However, the masses of the proton (1.6726 × 10−24 g) and neutron (1.6749 × 10−24 g) are not truly equal. There is a minor error in the expression of atomic masses relative to the simplest atom of hydrogen. For...
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Tandem Mass Spectrometry01:21

Tandem Mass Spectrometry

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Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and signal-to-noise ratio for the analyte. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.
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Mass Spectrometry: Isotope Effect01:13

Mass Spectrometry: Isotope Effect

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Most elements exist in nature as a mixture of isotopes. The isotopes differ in weight due to their respective number of neutrons. The molecular weight of a molecule is different depending on the specific isotope of its elements involved. As a result, the mass spectrum of the molecule exhibits peaks from the same fragment at multiple positions. The positions of these mass signals depend on the difference between the molecular mass. Furthermore, the intensity of these signals is dependent on the...
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Direct Comb Vernier Spectroscopy for Fractional Isotopic Ratio Determinations.

Mario Siciliani de Cumis1,2,3, Roberto Eramo2,3, Jie Jiang4

  • 1Agenzia Spaziale Italiana, Contrada Terlecchia SNC, 75100 Matera, Italy.

Sensors (Basel, Switzerland)
|September 10, 2021
PubMed
Summary
This summary is machine-generated.

Accurate greenhouse gas analysis is crucial for climate change mitigation. Direct comb Vernier spectroscopy precisely measures carbon dioxide (CO2) isotopes, enabling better climate monitoring.

Keywords:
Vernier spectroscopyfrequency combisotopic ratio

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Area of Science:

  • Atmospheric Chemistry
  • Spectroscopy
  • Environmental Science

Background:

  • Greenhouse gas isotopic composition analysis is vital for understanding climate change.
  • Optical frequency comb spectroscopy offers high precision for simultaneous monitoring of gas isotopes.
  • Direct comb Vernier spectroscopy is a promising technique for such analyses.

Purpose of the Study:

  • To discuss the capabilities of direct comb Vernier spectroscopy for determining fractional isotopic ratios.
  • To demonstrate the simultaneous monitoring of different isotope-substituted greenhouse gases.
  • To analyze the potential of this technique for isotopic applications of pollutants like CO2.

Main Methods:

  • Utilizing direct comb Vernier spectroscopy, which combines Fabry-Perot interferometry with a high-resolution spectrometer.
  • Recording simultaneous spectra of ro-vibrational transitions for 12C16O2 and 13C16O2.
  • Applying an accurate fitting procedure to analyze the recorded spectral data.

Main Results:

  • Simultaneous spectra of 12C16O2 and 13C16O2 were successfully recorded and analyzed.
  • A fractional isotopic ratio of 13C/12C in CO2 was measured with 3% precision.
  • The study demonstrates the technique's potential for isotopic analysis of CO2.

Conclusions:

  • Direct comb Vernier spectroscopy is effective for precise isotopic composition analysis of greenhouse gases.
  • This technique shows significant potential for monitoring CO2 isotopes and other pollutants.
  • Accurate isotopic measurements are essential for climate change mitigation efforts.