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1、INTERNATIONAL ISO STANDARD 7926 First edition 1991-12-01 Dehydrated tarragon (Artemisia dracunculus Linnaeus) - Specification Estragon deshydt-ate (Artemisia dracunculus Linnaeus) - SpWfkations - .-.-_- Reference number ISO 7926:1991(E) Copyright International Organization for Standardization Provid
2、ed by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/23/2007 21:59:39 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 7926:1991 (E) Foreword ISO (the International Organization for Standardization) is a worldwide federation
3、of national Standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Esch member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. I
4、nternational organizations, govern- mental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technic
5、al committees are circulated to the member bodies for voting. Publication as an Inter- national Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 7926 was prepared by Technical Committee ISO/TC 34, Agriculfural food products, Sub-Committee SC
6、 7, Spices and condimenfs. Annex A forms an integral patt of this International Standard. Annexes 6 and C are for information only. 0 ISO 1991 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronie or mechanical, including photocopying
7、and microfilm, without Permission in writing from the publisher. International Organization for Standardization Case Postals 56 l CH-121 1 Geneve 20 l Switzerland Printed in Switzerland Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Tech
8、nical Standards 1/9972545001 Not for Resale, 04/23/2007 21:59:39 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO 7926:1991(E) Dehydrated tarragon (Artemisia dracunculus Linnaeus) - Specification 1 Scope This International Standard specifies the re
9、quire- ments of dehydrated tarragon (Artemisia dracunculus Linnaeus) (methylchavicol typeI) in the form of whole or tut leaves and powder. lt does not apply to the elemicin-sabinene-type tarragon. Recommendations relating to storage and transport conditions are given in annex A for information. 2 No
10、rmative references The following Standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publi- cation, the editions indicated were valid. All stan- dards are subject to revision, and Parties to agreements based on this
11、 International Standard are encouraged to investigate the possibility of ap- plying the most recent editions of the Standards in- dicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 927:1982, Spices and condiments - Determi- nation of extraneous m
12、atter content. ISO 928:1980, Spices and condiments - Uetermi- nafion of total ash. ISO 930:1980, Spices and condiments - Determi- na tion of acid-insoluble ash. ISO 939:1980, Spices and condiments - Defermi- nafion of moisture content - Entrainment mefhod. ISO 1208:1982, Spices and condiments - Dete
13、rmi- nation of tilth. ISO 657111984, Spices, condiments and herbs - De- termination of volatile oil content. 3 Description (see figure 1) Tarragon is the perennial plant Artemisia dracunculus Linnaeus, belonging to the family Asteraceae. + lt is available commercially in the form of leaves and flowe
14、ring tops. The colour of the dried leaves ranges from pale green to grey-green. 1) Also called “estragole-type tarragon”. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/23/2007 21:59:39
15、 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 7926:1991 (E) Figure 1 - Tarragon - Stern with Ieaves 4 Requirements 4.1 Odour and flavour Tarragon has a typicaf, pleasing and aromatic odour. Its flavour is pungent, aromatic and rather Iike that of aniseed. It shall be
16、 free from all foreign flavour or odour, particularly that of mould. 4.2 Freedom from insects, moulds, etc. Uehydrated tarragon shall be free from living insects and moulds, and practically free from dead insects, insect fragments and rodent contamination visible to the naked eye (corrected, if nece
17、ssary, for ab- normal Vision) or with such magnification as may be necessary in any particular case. If the magnification exceeds x l0, this fact shall be mentioned in the test report. In cases of dispute, the contamination of tarragon powder form shall be determined by using t method specified in I
18、SO 1208. in :he 4.3 Extraneous matter For the purposes of this International Standard, all vegetable matter that does not belong to the tarragon plant and all other matter of animal (ex- cluding that arising from insects and rodents), veg- etable or mineral extran eous matter. origin are considered
19、to be The total percentage of extraneous matter in tarragon, determined in accordance with ISO 927, shall not exceed 1 % (m/rn). The proportion of broken Sterns in tarragon in the form of whole or tut leaves shall not exceed 3 740 (mlm). The proportion of yellow or brown leaves in tarragon in the fo
20、rm of whole or tut leaves shall not exceed 15 % (m/m). 4.4 Classification Tarragon may be classified according to the pro- ducing countty (e.g. France, Yugoslavia, etc.) and/or its form of presentation (e.g. according to different Cuts). 4.5 Chemical requirements Dehydrated tarragon in the form of w
21、hole or tut leaves and powder shall comply with the require- ments specified in table 1. Table 1 - Chemicall requirements Requirement Cflaracteristic Test Tarragon Tarragon met hod as as leaves powder Moisture content, Oh (m/m), max. ISO 939 Sundried 10 10 dried by artificial 7 -7 means Total ash, %
22、 (w/n), on dry basis, max. 12 12 ISO 928 Acid-insoiuble ash, Oh (m/m), on dry 13 195 ISO 930 basis, max. Volatile Oil, % (ml/lOO g), on 096 095 ISO 6571 dry basis, min. 4.6 Chromatographie requirements The volatile oil obtained by dry distillation of the dried leaves of tarragon, and analysed by usi
23、ng gas chromatography (for example, under the operating conditions indicated on the chromatogram given in annex C) shall comprise the following main con- stituents: cis-/?-ocimene, trans-/?-ocimene, trans- anethole, methylchavicol (estragole), and methyl- eugenol. 2 Copyright International Organizat
24、ion for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/23/2007 21:59:39 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 7926:1991 (E) The volatile oil shall not contain significant amounts of eith
25、er sabinene or elemicin. NOTE 1 Gas chromatography should not be carried out on the volatile oil obtained by the entrainment method (ISO 6571) which is used for the quantitative evaluation as specified in table 1. 5 Sampling Sampling should have been carried out in accord- ante with ISO 9482). 6 Tes
26、t methads Samples of tarragon in the form of whole or tut leaves and powder shall be tested for conformity with the requirements of this International Standard using the test methods specified in 4.3 and table 1. The analysis shall be carried out on the product as supplied. Samples of tarrag on in p
27、owd er form shall be subject to microscopic an alysis (see annex Al . 7 Packing and marking 7.1 Packing Dehyd rated ta rragon sh all be P acked in clean, Sound and dry contain ers made of a materia which does not affect the product but which protects it from the ingress or loss of moisture and volat
28、ile matter. 7.2 Marking The following particulars shall be marked directly on each package or shall be marked on a label at- tached to the package: a) name of the product and trade-name; b) name and address of the Producer or packer, or trade-mark; c) code or batch number; d) net mass; e) producing
29、country; and, if required, f) any other information requested by the pur- chaser, such as the year of harvest and the date of packing (if known); g) reference to this International Standard. 2) ISO 948:1980, Spices and condiments - Sampling. Copyright International Organization for Standardization P
30、rovided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/23/2007 21:59:39 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 7926:1991(E) Annex A (normative) Microscopic examination of the fragments of the dried leaves of tarr
31、agon Take a few fragments of the dried leaves (a few Square millimetres) and re-hydrate them by placing them in boiling water. Mount them in a microscope slide and observe them through the microscope. If there are no hairs or only hairs of the bifidated type (see figureA.l), the tarragon is of the m
32、ethylchavicol type (called “French tarragon”). If star-type trichomes are observed (see Figure A.2) the tarragon is of the elemicin-sabinene type (called “Russian tarragon”). Figure A.2 - Elemicin-sabinene-type tarragan Figure A.l - Methylchavicol-type tarragan Copyright International Organization f
33、or Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/23/2007 21:59:39 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 7926:1991(E) Annex B (informative) Recommendations relating to storage and transp
34、ort conditions B.1 Packages of tarragon shall be stored in cov- ered premises, weil protected from the sun, rain and excessive heat. provisions shall be made for fumigation of storerooms. B.2 The storeroom shall be dry, free from un- pleasant odours and protected against entry of in- sects and other
35、 vermin. Ventilation shall be adjusted to give good Ventilation during dry weather and to be fully closed under damp conditions. Suitable B.3 Packages shall be handled and transported in such a way that they are protected from the rain, sun or other sources of excessive heat, unpleasant odours and a
36、ny other contamination (especially in the holds of ships). Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/23/2007 21:59:39 MDTNo reproduction or networking permitted without license fro
37、m IHS -,-,- ISO 7926:1991(E) Annex C (informative) Typical chromatogram Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/23/2007 21:59:39 MDTNo reproduction or networking permitted withou
38、t license from IHS -,-,- ISO 7926:1991(E) t 0 .- E 0 F- 0 G g i s ?- E k -?. cv . . L 3 a E 5 . . 2 g .- s .- 5 .- s .- s 0 .- + a: - t Figure C.1 7 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for
39、Resale, 04/23/2007 21:59:39 MDTNo reproduction or networking permitted without license from IHS -,-,- This page intentionally left blank Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/2
40、3/2007 21:59:39 MDTNo reproduction or networking permitted without license from IHS -,-,- This page intentionally left blank Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/23/2007 21:59
41、:39 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 7926:1991(E) UDC 635,741 Descriptors: agr transportation. dcultural products, food products, seasonings, tarragon, specifications, packaging, marking, storage, Price based on 7 pages Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/23/2007 21:59:39 MDTNo reproduction or networking permitted without license from IHS -,-,-