1、BRITISH STANDARD BS ISO 9727-7:2007 Cylindrical cork stoppers Physical tests Part 7: Determination of dust content ICS 55.100; 79.100 BS ISO 9727-7:2007 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 June 2007 BSI 2007 ISBN 978 0 580 5294
2、0 5 National foreword This British Standard was published by BSI. It is the UK implementation of ISO 9727-7:2007. The UK participation in its preparation was entrusted to Technical Committee PRI/81, Cork. A list of organizations represented on this committee can be obtained on request to its secreta
3、ry. 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 cannot confer immunity from legal obligations. Amendments issued since publication Amd. No. Date Comments Reference numbe
4、r ISO 9727-7:2007(E)INTERNATIONAL STANDARD ISO 9727-7 First edition 2007-05-15 Cylindrical cork stoppers Physical tests Part 7: Determination of dust content Bouchons cylindriques en lige Essais physiques Partie 7: Dtermination de la quantit de poussires BS ISO 9727-7:2007ii iii Foreword ISO (the In
5、ternational 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 for which a technical committee h
6、as 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 all matters of electrotechnical
7、 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 are circulated to the member bodi
8、es 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 responsible for identifying any
9、or all such patent rights. ISO 9727-7 was prepared by Technical Committee ISO/TC 87, Cork. This first edition of ISO 9727-7, together with the other parts of ISO 9727:2007, cancels and replaces ISO 9727:1991, which has been technically revised. ISO 9727 consists of the following parts, under the gen
10、eral title Cylindrical cork stoppers Physical tests: Part 1: Determination of dimensions Part 2: Determination of mass and apparent density for agglomerated cork stoppers Part 3: Determination of humidity content Part 4: Determination of dimensional recovery after compression Part 5: Determination o
11、f extraction force Part 6: Determination of liquid tightness Part 7: Determination of dust content BS ISO 9727-7:2007 blank1 Cylindrical cork stoppers Physical tests Part 7: Determination of dust content 1 Scope This part of ISO 9727 specifies a test method for determining the dust content of a cyli
12、ndrical cork stopper. It is applicable to all types of cylindrical cork stoppers ready for use, intended to be completely inserted in the bottle neck (straight cork stoppers). 2 Normative references The following referenced documents are indispensable for the application of this document. For dated
13、references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 633, Cork Vocabulary 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 633 and the following apply
14、. 3.1 straight cork stopper ras de bague stopper which is completely introduced in the bottle neck, its superior end reaching the top border of the bottle 4 Materials 4.1 Ethanolic solution (10 %), prepared with demineralised water and previously filtered through a membrane of 1,2 m porosity. 5 Appa
15、ratus 5.1 Conical flask, of 500 ml capacity, with a bottom diameter of at least 100 mm. 5.2 Orbital stirrer, allowing to reach a rotational frequency between 140 r/min and 160 r/min. 5.3 Glass or stainless-steel filter, fixed to a vacuum device. 5.4 Membranes and oven, to dry them. BS ISO 9727-7:200
16、72 5.4.1 First possibility 5.4.1.1 Membrane, of cellulose acetate or polycarbonate with 1,2 m porosity. 5.4.1.2 Oven, regulated at 30 C 2 C. 5.4.2 Second possibility 5.4.2.1 Membrane, of glass microfibre with 1,2 m porosity. 5.4.2.2 Oven, regulated at 103 C 4 C. 5.5 Balance, with a resolution inferi
17、or or equal to 0,000 1 g. 5.6 Desiccator, with hygroscopic salt and saturation indicator. 6 Test conditions 6.1 Environment The test shall be carried out in an environment with the following characteristics: temperature 21 C 4 C; relative humidity of air 60 % 20 %. 6.2 Cork stoppers 6.2.1 Temperatur
18、e At the beginning of the test, confirm that the stoppers of the test sample are at a temperature of 21 C 4 C. 6.2.2 Humidity At the beginning of the test, confirm that the stoppers of the test sample are at a humidity of 6 % 2 %. If humidity is not between 4 % and 8 %, the result of the humidity ob
19、tained shall be referred to in the test report. 7 Sampling From each lot, take the quantity of stoppers that correspond to the sampling plan previously agreed between the interested parties. The test piece is composed of 4 cork stoppers. 8 Procedure 8.1 Place 4 cork stoppers in a 500 ml conical flas
20、k (5.1) and add 250 ml of the filtered ethanolic solution (4.1). 8.2 Place the conical flask for 10 min on the stirring plate (5.2) at a rotational frequency between 140 r/min and 160 r/min. 8.3 Filter the ethanolic solution obtained through a membrane of 1,2 m previously dried and weighted to 0,1 m
21、g. Register the initial mass, m 1 , expressed in milligrams. BS ISO 9727-7:20073 8.3.1 First possibility (5.4.1): filter on a membrane of cellulose acetate or polycarbonate (5.4.1.1). 8.3.2 Second possibility (5.4.2): filter on a membrane of glass microfibre (5.4.2.1). 8.4 Rinse the stoppers and con
22、ical flask with 50 ml of filtered ethanolic solution (4.1) and filter (8.3). 8.5 Rinse the membrane funnel with 50 ml of filtered ethanolic solution (4.1) and filter (8.3). 8.6 Transport the membrane to the oven and let it dry according to one of the following possibilities. 8.6.1 First possibility
23、(5.4.1): use the oven at 30 C 2 C (5.4.1.2) and let the membrane dry for 24 h. 8.6.2 Second possibility (5.4.2): use the oven at 103 C 4 C (5.4.2.2) and let the membrane dry for 1 h. 8.7 Let it cool in the desiccator for 30 min. 8.8 Weigh the membrane at ambient temperature to 0,1 mg and register th
24、e result, m 2 , expressed in milligrams (final mass). 9 Results The dust quantity per cork stopper, expressed in milligrams, rounded off to the nearest 0,1 mg, is given by the equation: (m 2 m 1 ) / 4 where m 1is the initial mass of the dried and weighted membrane (8.3); m 2is the final mass (8.8).
25、10 Test report The test report shall include the following information: a) a reference to this part of ISO 9727; b) complete identification of the sample, including its type and origin; c) sampling report; d) results obtained; e) any deviation from this part of ISO 9727 that may have affected the re
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