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Microdetemination of nitro and nitroso groups in aliphatic and aromatic compounds, especially in nitro-arginines

Mikrobestimmung von Nitro- und Nitrosogruppen in aliphatischen und aromatischen Verbindungen, besonders in Nitroargininderivaten

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Summary

A novel microanalytical method is described for the quantitative determination of nitro and nitroso groups in aliphatic, aromatic and nitro-arginine compounds.

During decomposition by pyrolysis in a stream of oxygen, nitrogen oxides and decomposition products containing nitrogen were formed from the nitro and nitroso groups of the substances studied. These were transformed into nitrogen dioxide by a lead dioxide packing. The nitrogen dioxide was absorbed in acetic acid and determined iodometrically after deoxygenation with carbon dioxide. A statistical evaluation of the results for ten aplihatic and aromatic compounds and eight nitro-arginine compounds showed the error did not exceed ±0.3% absolute.

Zusammenfassung

Zur quantitativen Bestimmung des Gehaltes an Nitro- und Nitrosogruppen in aliphatischen und aromatischen Verbindungen wird eine neue mikroanalytische Methode beschrieben.

Während des pyrolytischen Zerfalls im Sauerstoffstrom bilden sich Stickstoffoxide und stickstoffhaltige Zersetzungsprodukte aus den Nitro- und Nitrosogruppen der untersuchten Substanzen. Diese werden in einem mit Bleidioxid gefüllten Röhrchen zu Stickstoffdioxid umgewandelt.

Das in äquivalenter Menge gebildete Stickstoffdioxid wird absorbiert und jodometrisch bestimmt. Aufgrund der statistischen Auswertung ist die Genauigkeit der Resultate von 10 auf diese Weise bestimmten Verbindungen ±0,3%.

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Hegedüs, J., Karácsony, E.M. & Mázor, L. Microdetemination of nitro and nitroso groups in aliphatic and aromatic compounds, especially in nitro-arginines. Mikrochim Acta 73, 407–414 (1980). https://doi.org/10.1007/BF01196327

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  • DOI: https://doi.org/10.1007/BF01196327

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