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Bestimmung von Herbiciden der Klasse der N-Methoxy-N-methyl-N′-phenylharnstoffe

Determination of herbicides of the N-methoxy-N-methyl-N′-phenyl urea class

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Abstract

After hydrolysis of the sample in cone, phosphoric acid at 150‡C the resulting aniline and N-methoxy-N-methylamine are titrated polarovoltrically with sodium nitrite. Little amounts of related compounds included are determined gas chromatographically after hydrolysis.

Zusammenfassung

Zur Bestimmung von Herbiciden der Klasse der N-Methoxy-N-methyl-N′-phenylharnstoffe wird eine PhosphorsÄure bei 150‡C durchgeführt und das entstandene Anilin und das N-Methoxy-N-methylamin mit Natriumnitrit polarovoltrisch titriert. Nebenprodukte können nach der Hydrolyse gas-chromatographisch bestimmt werden.

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Literatur

  1. Boese, A. B., Jones, L. W., Major, R. T.: J. Am. Chem. Soc. 53, 3530 (1931).

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  2. Büchler, W.: diese Z. 186, 154 (1962).

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Authors and Affiliations

  1. Ciba-Geigy AG, Werk Monthey, Schweiz

    Jorge Rosales

Authors
  1. Jorge Rosales
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Den Herren O. Devillaz und R. Sieber sei für die experimentelle Unterstützung bestens gedankt.

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Rosales, J. Bestimmung von Herbiciden der Klasse der N-Methoxy-N-methyl-N′-phenylharnstoffe. Z. Anal. Chem. 256, 194–196 (1971). https://doi.org/10.1007/BF00534091

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  • DOI: https://doi.org/10.1007/BF00534091

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