Reference number
ISO 7106:1985
ISO 7106:1985
© ISO 2024
International Standard
ISO 7106:1985
Liquefied anhydrous ammonia for industrial use — Determination of oil content — Gravimetric and infra-red spectrometric methods
Edition 1
1985-06
1985-06
ISO 7106:1985
13691
Published
(Edition 1, 1985)
This publication was last reviewed and confirmed in 2019.
Therefore this version remains current.
Abstract
A test portion is evaporated at ambient temperature and the oil contained in the residue is extracted with carbon tetrachloride. The oil contained in the residue is determined either gravimetrically by evaporation of the organic solvent and weighing of the residue or by spectrometric measurement of the absorbance of the organic phase at a wavelength of approximately 3.42 m. The gravimetric method is applicable to products having an oil content equal to or greater than 10 mg/kg. The infra-red spectrometric method, being more sensitive, is applicable to products having an oil content greater than 1 mg/kg.