BS-ISO-20752-2007.pdf
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1、BRITISH STANDARD BS ISO 20752:2007 Cork stoppers Determination of releasable 2, 4, 6-trichloroanisol (TCA) ICS 79.100 ? Licensed Copy: London South Bank University, London South Bank University, Tue Jul 03 01:12:11 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS ISO 20752:2007 This British Standard wa
2、s published under the authority of the Standards Policy and Strategy Committee on 29 June 2007 BSI 2007 ISBN 978 0 580 56172 6 National foreword This British Standard was published by BSI. It is the UK implementation of ISO 20752:2007. The UK participation in its preparation was entrusted to Technic
3、al Committee PRI/81, Cork. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard
4、 cannot confer immunity from legal obligations. Amendments issued since publication Amd. No. DateComments Licensed Copy: London South Bank University, London South Bank University, Tue Jul 03 01:12:11 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Reference number ISO 20752:2007(E) INTERNATIONAL STANDAR
5、D ISO 20752 Cork stoppers Determination of releasable 2, 4, 6-trichloroanisol (TCA) Bouchons en lige Dosage du 2, 4, 6-trichloroanisol (TCA) relargable BS ISO 20752-2007 First edition 2007-02-01 Licensed Copy: London South Bank University, London South Bank University, Tue Jul 03 01:12:11 GMT+00:00
6、2007, Uncontrolled Copy, (c) BSI ii Licensed Copy: London South Bank University, London South Bank University, Tue Jul 03 01:12:11 GMT+00:00 2007, Uncontrolled Copy, (c) BSI iii Contents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references. 1 3 Terms and definitions. 1 4 Symbols and ab
7、breviated terms . 1 5 Principle. 2 6 Reagents 2 7 Apparatus 2 8 Sampling 3 9 Procedure 3 10 Expression of results . 4 11 Test report . 5 Bibliography. 6 BS ISO 20752-2007 Licensed Copy: London South Bank University, London South Bank University, Tue Jul 03 01:12:11 GMT+00:00 2007, Uncontrolled Copy,
8、 (c) BSI iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject f
9、or which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on
10、 all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees a
11、re circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held
12、responsible for identifying any or all such patent rights. ISO 20752 was prepared by Technical Committee ISO/TC 87, Cork. BS ISO 20752-2007 Licensed Copy: London South Bank University, London South Bank University, Tue Jul 03 01:12:11 GMT+00:00 2007, Uncontrolled Copy, (c) BSI v Introduction This me
13、thod intends to simulate migration phenomena that may occur when cork stoppers are used to close wine bottles. It consists of determining the releasable 2,4,6-trichloroanisol (TCA) based on an equilibrium between the solid (cork) and the liquid (hydro-alcoholic simulator) matrices, after submitting
14、a sample of cork stoppers to a period of maceration in a hydro-alcoholic solution. BS ISO 20752-2007 Licensed Copy: London South Bank University, London South Bank University, Tue Jul 03 01:12:11 GMT+00:00 2007, Uncontrolled Copy, (c) BSI blank Licensed Copy: London South Bank University, London Sou
15、th Bank University, Tue Jul 03 01:12:11 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 1 Cork stoppers Determination of releasable 2, 4, 6-trichloroanisol (TCA) 1 Scope This International Standard specifies a test method to determine releasable 2,4,6-trichloroanisol (TCA) from cork stoppers. This Intern
16、ational Standard is applicable to all types of cork stoppers. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document
17、(including any amendments) applies. ISO 633 1), Cork Vocabulary 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 633, and the following, apply. 3.1 simulator solution that intends to simulate the wine 3.2 internal standard compound of known concentrat
18、ion added to a sample to facilitate the qualitative identification and/or quantitative determination of the sample components 4 Symbols and abbreviated terms GC/ECD GC/MS Gas chromatography/electron-capture detector Gas chromatography/mass spectrometry SPME Solid phase microextraction TCA 2,4,6-Tric
19、hloroanisol 1) Under revision. BS ISO 20752-2007 Licensed Copy: London South Bank University, London South Bank University, Tue Jul 03 01:12:11 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 2 5 Principle Determination of releasable 2,4,6-trichloroanisol (TCA) from cork stoppers, previously subjected to
20、 maceration in a wine simulator, using solid-phase microextraction followed by the detection and quantification of this compound by GC/MS or GC/ECD. 6 Reagents Use only reagents of recognized analytical grade and distilled water. 6.1 Hydro-alcoholic solution, 12 % (volume fraction). 6.2 Absolute eth
21、anol. 6.4 Sodium chloride (NaCl). 6.5 2,4,6-Trichloroanisol (TCA) d5, purity W 98 % (for GC/MS). 6.6 2,4,6-Trichloroanisol (TCA), purity W 99 %. 6.7 Selected internal standard, purity W 99 % (for GC/ECD), of 2.3.6-T.C.A, for example. 7 Apparatus Standard laboratory apparatus and the following. 7.1 B
22、alance, with a resolution of at least 0,1 mg. 7.2 Glass maceration flasks, with a stopper of glass or metal or any other material not absorbing TCA, and with a capacity appropriate to the sample size. 7.3 Glass flasks (vial), of 10 ml minimum capacity (solution shall occupy at least 50 % of the vial
23、 capacity), with a silicone/PTFE septum and an appropriate stopper. 7.4 SPME fibre, 100 m polydimethlysiloxane PDMS, with either a manual support or a support suitable for automatic operation. 7.5 Heating source for the vial, set at a temperature of 35 C. 7.6 Automatic stirring system, for the SPME.
24、 7.7 Appropriated gas, of chromatographic purity. 7.8 Gas chromatograph, with a mass detector (MS) or an electron-capture detector (ECD). 7.9 Capillary column of light polarity silica glass. EXAMPLE Operating conditions: length 30 m, inside diameter 0,25 mm, film thickness 0,25 m, stationary phase:
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