BS-ISO-6883-2007.pdf
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1、BRITISH STANDARD BS ISO 6883:2007 Animal and vegetable fats and oils Determination of conventional mass per volume (litre weight in air) ICS 67.200.10 ? Licensed Copy: London South Bank University, London South Bank University, Sun Jun 17 07:16:00 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS ISO 68
2、83:2007 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 52905 4 National foreword This British Standard was published by BSI. It is the UK implementation of ISO 6883:2007. It supersedes BS 684-1-1:2000 whi
3、ch is withdrawn. The UK participation in its preparation was entrusted to Technical Committee AW/307, Oil seeds, animal and vegetable fats and oils and their by products. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purp
4、ort 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. DateComments Licensed Copy: London South Bank University, Londo
5、n South Bank University, Sun Jun 17 07:16:00 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Reference number ISO 6883:2007(E) INTERNATIONAL STANDARD ISO 6883 Fourth edition 2007-05-01 Animal and vegetable fats and oils Determination of conventional mass per volume (litre weight in air) Corps gras dorigi
6、nes animale et vgtale Dtermination de la masse volumique conventionnelle (poids du litre dans lair) BS ISO 6883:2007 Licensed Copy: London South Bank University, London South Bank University, Sun Jun 17 07:16:00 GMT+00:00 2007, Uncontrolled Copy, (c) BSI ii Licensed Copy: London South Bank Universit
7、y, London South Bank University, Sun Jun 17 07:16:00 GMT+00:00 2007, Uncontrolled Copy, (c) BSI iii Contents Page Foreword iv 1 Scope . 1 2 Normative references. 1 3 Term and definition. 1 4 Principle. 1 5 Apparatus 1 6 Sampling 2 7 Preparation of test sample. 3 8 Procedure 3 8.1 Calibration of pykn
8、ometer . 3 8.2 Determination 3 9 Expression of results . 4 9.1 Calculation of the volume of the pyknometer 4 9.2 Calculation of the conventional mass per volume 6 10 Precision 7 10.1 Interlaboratory tests. 7 10.2 Repeatability 7 10.3 Reproducibility 7 11 Test report . 7 Annex A (informative) Results
9、 of interlaboratory tests 8 Bibliography. 9 BS ISO 6883:2007 Licensed Copy: London South Bank University, London South Bank University, Sun Jun 17 07:16:00 GMT+00:00 2007, Uncontrolled Copy, (c) BSI iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of nat
10、ional 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 has been established has the right to be represented on that committee. Interna
11、tional 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 standardization. International Standards are drafted in accordance with the r
12、ules 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 bodies for voting. Publication as an International Standard requires approval by a
13、t 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 or all such patent rights. ISO 6883 was prepared by Technical Committee ISO/TC
14、 34, Food products, Subcommittee SC 11, Animal and vegetable fats and oils. This fourth edition cancels and replaces the third edition (ISO 6883:2000), which has been been technically revised. BS ISO 6883:2007 Licensed Copy: London South Bank University, London South Bank University, Sun Jun 17 07:1
15、6:00 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 1 Animal and vegetable fats and oils Determination of conventional mass per volume (litre weight in air) 1 Scope This International Standard specifies a method for the determination of the conventional mass per volume (“litre weight in air”) of animal
16、and vegetable fats and oils (hereinafter referred to as fats) in order to convert volume to mass or mass to volume. The procedure is applicable only to fats in a liquid state. The temperature of determination applied for any fat should be such that the fat does not deposit crystals at that temperatu
17、re. 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 (including any amendments) applies. ISO 661, Animal and ve
18、getable fats and oils Preparation of test sample ISO 3507, Laboratory glassware Pyknometers 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 conventional mass per volume litre weight in air quotient of the mass in air of fat to its volume at a
19、 given temperature NOTE It is expressed in kilograms per litre (numerically equal to grams per millilitre). 4 Principle The mass of a volume of liquid fat in a calibrated pyknometer is measured at a specified temperature. 5 Apparatus Usual laboratory apparatus and, in particular, the following. 5.1
20、Water bath, capable of being maintained to within 0,1 C of the temperatures chosen for the calibration and determination. BS ISO 6883:2007 Licensed Copy: London South Bank University, London South Bank University, Sun Jun 17 07:16:00 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 2 It should be fitted w
21、ith a calibrated thermometer, graduated in divisions of 0,1 C covering the relevant temperature range. 5.2 Pyknometer (Jaulmes), of capacity 50 ml, with side-arm. It should be fitted by means of conical joints with a calibrated thermometer graduated in divisions of 0,1 C and with a cap perforated at
22、 the top for the side-arm (see Figure 1). The pyknometer should preferably be made of borosilicate glass, but if this is not available then one made of soda glass may be used. NOTE The cap is only essential if the determination is carried out at a temperature below ambient. Alternatively, the Type 3
23、 (Gay-Lussac) pyknometer (see Figure 2) specified in ISO 3507 may be used; however, the use of a pyknometer with thermometer is preferred. Figure 1 Jaulmes pyknometer Figure 2 Gay-Lussac pyknometer 6 Sampling A representative sample should have been sent to the laboratory. It should not have been da
24、maged or changed during transport or storage. Sampling is not part of the method specified in this International Standard. A recommended sampling method is given in ISO 5555. BS ISO 6883:2007 Licensed Copy: London South Bank University, London South Bank University, Sun Jun 17 07:16:00 GMT+00:00 200
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