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ISO 19817:2017 pdf free

ISO 19817:2017 pdf free.Essential oil of thyme [Thymus vulgaris L. and Thymus zygis L.], thymol type
This document specifies characteristics of the essential oil of thyme [Thymus vulgaris L. and Thymus zygis L.], thymol type, in order to facilitate the assessment of its quality.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO/TS 210, Essential oils一General rules for packaging, conditioning and storage
ISO/TS 211, Essential oils一General rules for labelling and marking of containers
ISO 212, Essential oils一Sampling
ISO 279, Essential oils一Determination of relative density at 20 °C一Reference method
ISO 280, Essential oils一Determination of refractive index
ISO 592, Essential oils一Determination of optical rotation
ISO 875, Essential oils一Evaluation of miscibility in ethanol
ISO 11024 (all parts), Essential oils一General guidance on chromatographic profiles
3 Terms and definition
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
一ISO Online browsing platform: available at https://www.iso.org/obp
一IEC Electropedia: available at http://www.electropedia.org/
3.1 essential oil of thyme, thymol type
essential oil obtained by steam distillation of the flowering tops of Thymus vulgaris L., of the Lamiaceae family, grown mainly in Germany, Hungary and Poland, and Thymus zygis L, of the Lamiaceae family,grown mainly in Spain and Portugal
Note 1 to entry: For information on CAS number, see ISO/TR 21092.
4.2 Chromatographic profile
Carry out the analysis of the essential oil by gas chromatography. Determine the chromatographic profile in accordance with ISO 11024 (all parts). Identify in the chromatogram obtained the representative and characteristic components shown in Table 2. The proportions of these components, indicated by the integrator, shall be as shown in Table 2. This constitutes the chromatographic profile of the essential oil.ISO 19817 pdf free download.

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