Separation and Analysis of Various Forms of Hydrogen by Adsorption and Gas Chromatography

Akhtar, S.; Smith, Hilton A.

doi:10.1021/cr60229a003

Cited by 33 publications

(5 citation statements)

References 39 publications

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“…The distinctly different thermodynamic properties of the two forms [5] and their mode of interaction with surfaces make possible separation of the hydrogen allotropes by selective adsorption or chromatography [7]. The separation of the allotropes of hydrogen and deuterium illustrated in figure 4 [8] might even be described as a striking macro-scale manifestation of the Pauli exclusion principle!…”

Section: (C) Enrichment Of Less Stable Spin Isomers (I) Chromatography and Selective Adsorptionmentioning

confidence: 99%

Nuclear spin isomers of guest molecules in H ₂ @C ₆₀ , H ₂ O@C ₆₀ and other endofullerenes

Chen

Frunzi

et al. 2013

Phil. Trans. R. Soc. A.

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Spectroscopic studies of recently synthesized endofullerenes, in which H 2 , H 2 O and other atoms and small molecules are trapped in cages of carbon atoms, have shown that although the trapped molecules interact relatively weakly with the internal environment they are nevertheless susceptible to appropriately applied external perturbations. These properties have been exploited to isolate and study samples of H 2 in C 60 and other fullerenes that are highly enriched in the para spin isomer. Several strategies for spin-isomer enrichment, potential extensions to other endofullerenes and possible applications of these materials are discussed.

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Section: (C) Enrichment Of Less Stable Spin Isomers (I) Chromatography and Selective Adsorptionmentioning

confidence: 99%

Nuclear spin isomers of guest molecules in H ₂ @C ₆₀ , H ₂ O@C ₆₀ and other endofullerenes

Chen

Frunzi

et al. 2013

Phil. Trans. R. Soc. A.

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“…The problem of separating the isotopic hydrogens H2, HD, HT, D2, DT, and T2 by gas chromatography has been examined in a number of different studies. Several fairly effective methods have been developed, all based on adsorption on solid substrates such as AI2O3, A12Os "I-Fc203, AI2O3 -{-Cr2Os, molecular sieves, and silica gel (1).…”

Section: Time After Injection Of Sample (Minutes)mentioning

confidence: 99%

Improved Separation of Isotopic Hydrogens by Gas Chromatography

Gersh¹

1965

Anal. Chem.

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“…Interestingly, electrochemical reactions in the liquid phase at near liquid nitrogen temperature have been reported [4]. In the field of separation analysis, gas chromatography (GC) at cryogenic temperatures has been reported [5][6][7][8]. However, analyte for cryogenic GC is limited to permanent gases because strong adsorption prevents the elution of other compounds from the column.…”

Section: Introductionmentioning

confidence: 99%

Ultralow-Temperature HPLC Using Low-Molecular-Weight Hydrocarbons as Mobile Phases

et al. 2020

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In ultralow-temperature HPLC, analyte retention is often enhanced, inhibiting elution. To solve this problem, we have investigated the use of low-molecular-weight hydrocarbons, methane and ethane, as the mobile phase in a monolithic ODS column. Analyte retention was successfully reduced by the use of these mobile phases, and elution of mono-and di-chloromethane and n-octane, which were not eluted in our previous work using a liquid nitrogen based mobile phase, was achieved. The analysis of octane structural isomers revealed that, in cryogenic HPLC, the retention of branched octanes was significantly reduced compared to the retention of n-octane, i.e., the retention factor of iso-octane (2,2,4-trimethylpentane) was almost negligible. The retention factors of branched octanes were distributed between those of n-pentane and n-heptane in HPLC at-176°C, whereas, in gas chromatography at 50°C, these values were between those of n-heptane and n-octane.

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Separation and Analysis of Various Forms of Hydrogen by Adsorption and Gas Chromatography

Cited by 33 publications

References 39 publications

Nuclear spin isomers of guest molecules in H ₂ @C ₆₀ , H ₂ O@C ₆₀ and other endofullerenes

Nuclear spin isomers of guest molecules in H ₂ @C ₆₀ , H ₂ O@C ₆₀ and other endofullerenes

Improved Separation of Isotopic Hydrogens by Gas Chromatography

Ultralow-Temperature HPLC Using Low-Molecular-Weight Hydrocarbons as Mobile Phases

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Separation and Analysis of Various Forms of Hydrogen by Adsorption and Gas Chromatography

Cited by 33 publications

References 39 publications

Nuclear spin isomers of guest molecules in H 2 @C 60 , H 2 O@C 60 and other endofullerenes

Nuclear spin isomers of guest molecules in H 2 @C 60 , H 2 O@C 60 and other endofullerenes

Improved Separation of Isotopic Hydrogens by Gas Chromatography

Ultralow-Temperature HPLC Using Low-Molecular-Weight Hydrocarbons as Mobile Phases

Contact Info

Product

Resources

About

Nuclear spin isomers of guest molecules in H ₂ @C ₆₀ , H ₂ O@C ₆₀ and other endofullerenes

Nuclear spin isomers of guest molecules in H ₂ @C ₆₀ , H ₂ O@C ₆₀ and other endofullerenes