Numéro de référence
ISO 1897-8:1977
ISO 1897-8:1977
Phénol, o-crésol, m-crésol, p-crésol, acide crésylique et xylénols à usage industriel — Méthodes d'essai — Partie 8: Détermination de la teneur en o-crésol (Acide crésylique et xylénols uniquement)
Edition 1
1977-04
Annulée
ISO 1897-8:1977
6582
Annulée (Edition 1, 1977)

Résumé

This method is the best available at the present time. It was primarily intended for samples containing 40 % (m/m) or more but has been extended to lower ranges. The principle is based on dehydration of a quantity of the test sample. Formation of a complex between o-cresol and cineole (having a crystallizing point not lower than 1,2 °C) by addition of excess cineole to a test portion of the dehydrated sample. Determination of the crystallizing point of the complex in a crystallizing point apparatus. Calculation of the content from the water content of the test sample and the crystallizing point of the complex. The relation between crystallizing point and o-cresol content of o-cresol/cineole mixtures is given in a table. ISO 1897/8 replaces ISO Recommendation R 1910-1971.

Informations générales

  •  : Annulée
     : 1977-04
    : Annulation de la Norme internationale [95.99]
  •  : 1
     : 5
  • ISO/TC 47
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