Numéro de référence
ISO 1041:1973
ISO 1041:1973
© ISO 2024
Norme internationale
ISO 1041:1973
Huiles essentielles — Détermination du point de congélation
Edition 1
1973-12
1973-12
ISO 1041:1973
5518
Publiée
(Edition 1, 1973)
Cette publication a été révisée et confirmée pour la dernière fois en 2020.
Cette édition reste donc d’actualité.
Résumé
The determination consists in slow and progressive cooling of the essential oil and observation of the variations in temperature as the oil passes from the liquid to the solid state. The apparatur for determination of freezing point consists of a wide-mouthed container of about 500 ml capacity, provided with a bored cork or rubber stopper into which a stout-walled test tube is inserted. Another smaller test tube is fitted into the stout-walled test tube by means of another bored cork or rubber stopper. Into the smaller test tube a thermometer is inserted.