Identification of the Structure of Non-volatile Organic Substances by Gas Chromatography of Pyrolytic Products

Janák, J.

doi:10.1038/185684a0

Cited by 84 publications

(16 citation statements)

References 4 publications

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“…The pyrolysi"s" patterns of the fulvic acids and the percentages of pyrolyzed material,on the :one, h~d, and the E4/E6 ratios and IR spectra of the residues of of pyrolysis, on the other, indicate that their structures differ, though perhaps only slightly, as occurs in isomeric compounds (Janak, 1960;Jennings and Dimick, 1962).…”

Section: Discussionmentioning

confidence: 99%

Effects of extractants on analytical characteristics and pyrolysis gas chromatography of podzol fulvic acids

Martı́n

1976

Geoderma

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Martín, F., 1976. Effects of extractants on analytical characteristics and pyrolysis gas chromatography of Podzol fulvic acids. Geoderma, 15: 253-:-265. Fulvic acids extracted from the Bh horizon of a Podzol with three reagents: NaOH, HCl and the mixture Na4P~07/NaOH, show no significant differences by physical and chemical analysis with the exception of the N-content of the NaOH extract and the E4/E6 ratios of those extracted with HCl and Na4P207/NaOH, indicating that these fulvic acids have very few condensed aromatic nuclei structures. Pyrolysis gas chromatography of the three fulvic-acid specimens produces the same low-boiling-point compounds, but in different amounts. Various alkanes and olefins as. well as other compounds have been identified. By pyrolysis of the methylated fulvic acids, it has been shown that part of the resulting compounds are produced' by reactions of component radicals. The main pyrolysis reaction appears to be dehydration. The pyrolysis patterns of the three fulvic-acid specimens provide evidence that there are some differences in structure not evident from conventional physicaI and chemical analysis.

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Section: Discussionmentioning

confidence: 99%

Effects of extractants on analytical characteristics and pyrolysis gas chromatography of podzol fulvic acids

Martı́n

1976

Geoderma

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“…417 Janäk was the first to apply pyrolysis gas chromatography to study the structure of barbiturates. 207 This method was used in studying the structures of Veronal, Dial, and Endom and proved useful. Nelson and Kirk investigated the pyrolytic products of 27 substituted barbituric acids, whose sodium salts are used in therapy.…”

Section: E Dioxanes and Their Derivativesmentioning

confidence: 99%

Gas–Liquid Chromatography of Heterocyclic Compounds

Gol'dfarb

Yakerson

Ferapontov

et al. 1971

Physical Methods in Heterocyclic Chemistry

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“…Janak (76) identified barbiturates by G C separation of their pyrolytic products by heating the sample to 800" ; a similar procedure was described later by Nelson and Kirk (77). Separation of barbiturates by G C by preparing dimethyl derivatives of barbiturates after reaction with diazomethane was described by Cook et al (78) and Cook (79).…”

Section: Spectrophotometry-spectrophotometric Techniquesmentioning

confidence: 99%

Drug Abuse Screening Programs: Detection Procedures, Development Costs, Street-Sample Analysis, and Field Tests

Kaistha

1972

Journal of Pharmaceutical Sciences

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Identification of the Structure of Non-volatile Organic Substances by Gas Chromatography of Pyrolytic Products

Cited by 84 publications

References 4 publications

Effects of extractants on analytical characteristics and pyrolysis gas chromatography of podzol fulvic acids

Effects of extractants on analytical characteristics and pyrolysis gas chromatography of podzol fulvic acids

Gas–Liquid Chromatography of Heterocyclic Compounds

Drug Abuse Screening Programs: Detection Procedures, Development Costs, Street-Sample Analysis, and Field Tests

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