ISO 7356:1985, Oils of thujone-containing Artemisia and oil of sage (Salvia officinalis Linnaeus) -- Determination of alpha- and beta-thujone content -- Gas chromatographic method on packed columns

A small quantity of the oils is analyzed under specified conditions. The alpha- and beta-thujone contents are determined by using the internal standard or addition method. As stationary phase are used cyanopropyl methylphenyl methyl silicone, or trifluoropropylmethyl silicone, or polyethylene glycol 1500. Operating temperatures: Oven: isotherm about 100 �C when using cyanopropyl methylphenyl methyl silicone or trifluoropropylmethyl silicone; isotherm about 130-�C when using polyethylene glycol 1500. Injection system and detector: about 170 �C. This title may contain less than 24 pages of technical content.