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1、BRITISH STANDARD BS ISO 1271:1983 Essential Oils Determination of carbonyl value Free hydroxylamine method ICS 71.100.60; 71.040.40 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 04:21:26 GMT+00:00 2006, Uncontrolled Copy
2、, (c) BSI BS ISO 1271:1983 This British Standard, having been prepared under the direction of the Consumer Products and Services Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 September 2001 BSI 08-2001 ISBN 0 580 38320 2 National foreword
3、This British Standard reproduces verbatim ISO 1271:1983 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee AW/54, Essential Oils, which has the responsibility to: A list of organizations represented on this committee can be obt
4、ained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find”
5、facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal ob
6、ligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summar
7、y of pages This document comprises a front cover, an inside front cover, the ISO title page, the ISO foreword page, pages 1 to 4, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication
8、Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 04:21:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI w - International Standard INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.MEXAYHAPOAHAR OPrAHM3AL in moles per litre, of the 1) The method for the potentiometric titration
9、 of essential oils will form the subject of ISO 4726. 2 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 04:21:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 12714983 (EI m is the mass, in grams, of the test Portion (8.2); V. is the volume, in millilitres tion (5.1) u sed in the blank test
10、of hydrochloric acid solu- (8.3); VI is the volume, in millilitres, of hydrochloric acid solu- tion (5.1) used in the determination (8.4). The carbonyl compounds content, expressed as a specified aldehyde or ketone as a percentage by mass, is given by the formula M, wo - V,) IOm ” M, is the relative
11、 molecular mass of the aldehyde or ketone specified in the International Standard specification for the essential oil concerned. Express the result to two significant figures. 10 Test report The test report shall state the method used and the result ob- tained. lt shall also mention any operating co
12、nditions not specified in this International Standard, or regarded as op- tional, as well as any circumstances that might have influenced the results. c, m, V. and VI have the same meanings as above; The test report s #ball include all iden tification of the Sample. required for the complete License
13、d Copy: sheffieldun sheffieldun, na, Mon Nov 27 04:21:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 12714983 (El Annex Modified procedure to be used for strongly coloured essentials oils when the potentiometric method cannot be applied (This annex forms an integral part of the Standard.) Transfe
14、r, by means of a pipette (6.1.21, 20 ml of the hydrox- Titrate with the hydrochloric acid Solution (5.1) until the ylammonium chloride Solution (5.4) into a flask (6.1 .l). Add greenish-yellow end-point is observed. 15 or ml of the a burette potassium and mix. hydroxide Solution (5.2) from a pipette
15、 Transfer the mixture into the flask containing the test Portion and retain the emptied conical flask without washing it. Allow the flask containing the mixture to stand, or boil under reflux, for the time specified in the International Standard specification for the essential oil concerned. If boil
16、ing is carried out, cool rapidly before removing the reflux condenser. Transfer about half of the content to the original flask, neutralize until the Solution takes on a lemon-yellow colour, transfer to the other flask, mix, and again return one half of the Solution to the original flask. Repeat thi
17、s Operation until the addition of two drops of the hydrochloric acid Solution (5.1) to the Solution contained in one of the two flasks Causes no further Change of colour when compared with the Solution contained in the other flask. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 04:21:26 GMT+
18、00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 04:21:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 1271:1983 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing
19、 British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. I
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26、s permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means electronic, photocopying, recording or otherwise without prior written permission from BSI. This does not preclude the free use, in the
27、course of implementing the standard, of necessary details such as symbols, and size, type or grade designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel: 020 8996 7070. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 04:21:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI