Detection and analysis for hydrogen isotopes and spin isomers by low-pressure chemical ionization mass spectrometry

Mack, A. R.; Liu, Yen‐Chun; Luo, Wei; Liu, L.; Parcher, Jon F.

doi:10.1021/ac00073a020

Cited by 3 publications

(2 citation statements)

References 14 publications

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“…Hydrogen gas can only be analyzed by GC using a thermal conductivity detector (TCD), a helium ionization detector (HID), or an atomic emission detector (AED) [11,12]. Indirect detection of hydrogen gas by gas chromatography using electron ionization (EI) ion source mass spectrometry is possible [11,13,14]. Not only are these methods costly, but they are also time-consuming.…”

Section: Introductionmentioning

confidence: 99%

High-Precision Trace Hydrogen Sensing by Multipass Raman Scattering

Singh

Müller

2023

Sensors

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Despite its growing importance in the energy generation and storage industry, the detection of hydrogen in trace concentrations remains challenging, as established optical absorption methods are ineffective in probing homonuclear diatomics. Besides indirect detection approaches using, e.g., chemically sensitized microdevices, Raman scattering has shown promise as an alternative direct method of unambiguous hydrogen chemical fingerprinting. We investigated the suitability of feedback-assisted multipass spontaneous Raman scattering for this task and examined the precision with which hydrogen can be sensed at concentrations below 2 parts per million. A limit of detection of 60, 30, and 20 parts per billion was obtained at a pressure of 0.2 MPa in a 10-min-long, 120-min-long, and 720-min-long measurement, respectively, with the lowest concentration probed being 75 parts per billion. Various methods of signal extraction were compared, including asymmetric multi-peak fitting, which allowed the resolution of concentration steps of 50 parts per billion, determining the ambient air hydrogen concentration with an uncertainty level of 20 parts per billion.

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Section: Introductionmentioning

confidence: 99%

High-Precision Trace Hydrogen Sensing by Multipass Raman Scattering

Singh

Müller

2023

Sensors

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“…However, another GC detection of H 2 is possible using MS. Based on the detection and analysis of H 2 isotopes by low‐pressure chemical ionization MS, it is possible to perform an indirect detection of H 2 with an electron ionization (EI) ion source. Analysis of H 2 isotopes by low‐pressure chemical ionization involves the detection of protonated reagent gas ions (such as argon, neon, He or N 2 ) rather than the direct detection of 1 H 2 + and 2 H 2 + at masses below the scan limits of most quadrupole GC–MS systems . Gas protonation of H 2 , He and O 2 in a N 2 purged atmosphere was already studied with a quadrupole ion trap mass spectrometer .…”

Section: Introductionmentioning

confidence: 99%

Indirect hydrogen analysis by gas chromatography coupled to mass spectrometry (GC–MS)

2013

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Gas chromatography (GC) is an analytical tool very useful to investigate the composition of gaseous mixtures. The different gases are separated by specific columns but, if hydrogen (H2 ) is present in the sample, its detection can be performed by a thermal conductivity detector or a helium ionization detector. Indeed, coupled to GC, no other detector can perform this detection except the expensive atomic emission detector. Based on the detection and analysis of H2 isotopes by low-pressure chemical ionization mass spectrometry (MS), a new method for H2 detection by GC coupled to MS with an electron ionization ion source and a quadrupole analyser is presented. The presence of H2 in a gaseous mixture could easily be put in evidence by the monitoring of the molecular ion of the protonated carrier gas.

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