ISO 21370:2019 pdf download

ISO 21370:2019 pdf download.Traditional Chinese medicine — Dendrobium officinale stem
1 Scope
This document specifies minimum requirements and test methods for Dendrobium officinale stem that is derived from cultivated Dendrobium officinale Kimura et Migo.
It is applicable to Dendrobium officinale stem that is sold and used as Chinese materia medica (whole edicinal materials) and decoction pieces derived from this plant.
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 1575, Tea — Determination of total ash
ISO 18664, Traditional Chinese Medicine — Determination of heavy metals in herbal medicines used in Traditional Chinese Medicine
ISO 20409, Traditional Chinese medicine — Panax notoginseng root and rhizome
ISO 21371, Traditional Chinese medicine — Labelling requirements of products intended for oral or topical use
CAC/MRL01, Maximum Residue Limits for Pesticides in Foods
CODEX STAN 229, Analysis of pesticide residues: Recommended methods
World Health Organization. Quality control methods for herbal materials, General advice on sampling, 2011
3 Terms and definitions
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:
— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
3.1 fresh stem
stem that is newly harvested and has not undergone any processing
3.2 dried stem
stem prepared by cleaning, cutting and then heating or sun-drying
5.2 Dendrobium officinale stem
5.2.1 Morphological features
5.2.1.1 Fresh stem
Cylindrical, circular for cross section. Nodes distinct, unbranched. Purple-dotted leaf sheath. Externally yellowish-green, striated longitudinally. Odour slight. Taste mild, then sweet and viscous on chewing.
5.2.1.2 Dried stem
Cylindrical, differ in length. Externally greyish-green, yellowish-green or golden yellow, striated longitudinally, sometimes grey leaf sheath remained. Odour slight. Taste mild, then viscous on chewing.
5.2.1.3 Processed stem
Spiral or spring-like, usually with two to six spires. Texture compact, easily broken, fracture even, grey to greyish-green. Externally yellowish-green or golden yellow, striated longitudinally, sometimes grey leaf sheath remained. Odour slight. Taste mild, then viscous on chewing.
5.2.2 Thin-layer chromatogram (TLC) identification
The identification of Dendrobium officinale stem by thin-layer chromatogram (TLC) shall present spots or bands with the same colour and position corresponding to those of reference standard solution.
5.2.3 Moisture
The mass fraction of moisture should not be more than 14,0 %.
NOTE The fresh stem is exempt from this test.
5.2.4 Total ash
The mass fraction of total ash should not be more than 7,0 %.
NOTE The fresh stem is exempt from this test.
5.2.5 Ethanol-soluble extractives
The mass fraction of ethanol-soluble extractives should not be less than 5,0 %.
NOTE The fresh stem is exempt from this test.