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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN ISO 665:2000 BS 428
2、9-3:2000 The European Standard EN ISO 665:2000 has the status of a British Standard ICS 67.200.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Oilseeds Determination of moisture and volatile matter content Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 14:01:21 GMT+
3、00:00 2006, Uncontrolled Copy, (c) BSI 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 November 2000 BSI 11-2000 ISBN 0 580 36617 0 BS EN I
4、SO 665:2000 Amendments issued since publication Amd. No.DateComments National foreword This British Standard is the official English language version of EN ISO 665:2000. It is identical with ISO 665:2000. It supersedes BS 4289-3:1995 which is withdrawn. The UK participation in its preparation was en
5、trusted to Technical Committee AW/2, Oilseeds and residues, which has the responsibility to: 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 rel
6、ated international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normally include an annex which lists normativ
7、e references to international publications with their corresponding European publications. The British Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled International Standards Correspondence Index, or by usi
8、ng the Find 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 f
9、rom legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title page, the EN ISO foreword page, the ISO title page, pages ii and iii, a blank page, pages 1 to 8, the annex ZA page and a back cover. The BSI copyright notice displayed in this docu
10、ment indicates when the document was last issued. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 14:01:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 665 September 2000 ICS 67.200.20Supersedes EN ISO 665:2000 English version Oilseeds -
11、Determination of moisture and volatile matter content (ISO 665:2000) Graines olagineuses - Dtermination de la teneur en eau et en matires volatiles (ISO 665:2000) lsamen - Bestimmung des Feuchtegehaltes und der flchtigen Bestandteile (ISO 665:2000) This European Standard was approved by CEN on 15 Se
12、ptember 2000. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be
13、 obtained on application to the Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Managemen
14、t Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EURO
15、PEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2000 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 665:2000 E Licensed Cop
16、y: sheffieldun sheffieldun, na, Sun Nov 19 14:01:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Foreword The text of the International Standard ISO 665:2000 has been prepared by Technical Committee ISO/TC 34 “Agricultural food products“ in collaboration with Technical Committee CEN/TC 307 “Oilseeds,
17、vegetable and animal fats and oils and their by-products - Methods of sampling and analysis“, the secretariat of which is held by AFNOR. This European Standard supersedes EN ISO 665:1995. This European Standard shall be given the status of a national standard, either by publication of an identical t
18、ext or by endorsement, at the latest by March 2001, and conflicting national standards shall be withdrawn at the latest by March 2001. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Aus
19、tria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the International Standard ISO 665:2000 was approved by CEN as a European St
20、andard without any modification. NOTE: Normative references to International Standards are listed in annex ZA (normative). EN ISO 665:2000 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 14:01:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Reference number ISO 665:2000(E) INTERNATIONAL STANDAR
21、D ISO 665 Second edition 2000-09-15 Oilseeds Determination of moisture and volatile matter content Graines olagineuses Dtermination de la teneur en eau et en matires volatiles EN ISO 665:2000 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 14:01:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI i
22、i EN ISO 665:2000 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 14:01:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing Interna
23、tional 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. International organizations, governmental and non-governmental, in liaison with
24、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 rules given in the ISO/IEC Directives, Part 3. Draft International Standar
25、ds adopted by the technical committees are 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 International Standard may b
26、e the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. International Standard ISO 665 was prepared by Technical Committee ISO/TC 34, Food products, Subcommittee SC 2, Oleaginous seeds and fruits. This second edition cancels and replaces the f
27、irst edition (ISO 665:1997), which has been technically revised. Annex A of this International Standard is for information only. EN ISO 665:2000 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 14:01:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 665:2000 Licensed Copy: sheffieldun sheff
28、ieldun, na, Sun Nov 19 14:01:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 1 Oilseeds Determination of moisture and volatile matter content 1 Scope This International Standard specifies a method for the determination of the moisture and volatile matter content of oilseeds. 2 Normative reference The
29、following normative document contains provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of this publication do not apply. However, parties to agreements based on this International Stan
30、dard are encouraged to investigate the possibility of applying the most recent edition of the normative document indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Stand
31、ards. ISO 664:1990, Oilseeds Reduction of laboratory sample to test sample. 3 Term and definition For the purposes of this International Standard, the following term and definition applies. 3.1 moisture and volatile matter content loss in mass measured under the operating conditions specified in thi
32、s International Standard NOTE It is expressed as a mass fraction, in percent formerly given as % (m/m) of the mass of the initial sample. 4Principle The moisture and volatile matter content of a test portion is determined, either on the material as received (pure seed and impurities) or, if required
33、, on the pure seed alone, by drying at 103 C ? 2 C in an oven at atmospheric pressure, until practically constant mass is reached. 5 Apparatus Usual laboratory apparatus and, in particular, the following. 5.1 Analytical balance, capable of weighing to the nearest 0,001 g. 5.2 Mechanical mill, easy t
34、o clean, suitable for the kind of seed and allowing the latter to be ground without heating and without appreciable change in moisture, volatile matter and oil content. 5.3 Mechanical grater or, if not available, a hand-operated grater. EN ISO 665:2000 Licensed Copy: sheffieldun sheffieldun, na, Sun
35、 Nov 19 14:01:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 2 5.4 Flat-bottomed vessel, either of metal or glass, at the discretion of the analyst. If metal is used, it shall be resistant to attack under the test conditions. The vessel shall be provided with a well- fitting lid and shall allow the t
36、est portion to be spread to about 0,2 g/cm2(e.g. a vessel of diameter 70 mm and height 30 mm to 40 mm). Glass vessels with ground closures may also be used. 5.5 Electric oven, with thermostatic control and good natural ventilation, capable of being regulated so that the temperature of the air and of
37、 the shelves in the neighbourhood of the test portions lies between 101 C and 105 C in normal operation. 5.6 Desiccator, containing an efficient desiccant such as phosphorus(V) oxide, silica gel, activated alumina, etc., and provided with a ceramic plate which allows vessels (5.4) to cool rapidly. 6
38、 Sampling Sampling is not part of the method specified in this International Standard. A recommended sampling method is given in ISO 542 ?1?. It is important that the laboratory receive a sample which is truly representative and has not been damaged or changed during transport and storage. 7 Prepara
39、tion of test sample 7.1 Prepare the test sample by reducing the laboratory sample in accordance with ISO 664. If large non- oleaginous foreign bodies have been separated before reduction of the laboratory sample, make allowance for this in the calculation (see 9.2). According to the requirements of
40、the contract, take a sample as received or after separation of the impurities. 7.2 In the case of copra, grate the product by hand or, preferably, use a mechanical grater (5.3) which allows the whole sample to be treated. When grating by hand, which does not allow all the analysis sample to be grate
41、d, endeavour to obtain a test sample which is as representative as possible and, to this end, take account of the size and colour of different fragments. The length of the particles after grating may exceed 2 mm, but shall not be greater than 5 mm. Mix the particles carefully and carry out the deter
42、mination without delay. 7.3 In the case of seeds of medium size (groundnut, etc.), except for safflower seed, sunflower seed, soya beans and cottonseed with adherent linters, grind the test sample in the mechanical mill (5.2), which has previously been well cleaned, until the major dimension of the
43、particles obtained is not greater than 2 mm. Reject the first particles (about one-twentieth of the sample). Collect the rest, mix carefully and carry out the determination without delay. 7.4 Small seeds (linseed, colza, hemp, etc.) as well as safflower seed, sunflower seed, soya beans and cottonsee
44、d with adherent linters, are analysed without previous grinding. 8 Procedure 8.1 Test portion 8.1.1 Dry the vessel with its lid for 1 h at 103 C prior to being placed in the desiccator before weighing. Weigh the vessel (see 5.4) with its lid to the nearest 0,001 g, after leaving it open for at least
45、 30 min in the desiccator (see 5.6) at laboratory temperature. EN ISO 665:2000 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 14:01:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 3 8.1.2 Then weigh into the vessel, to the nearest 0,001 g, ?either 5 g ? 0,5 g of the grated product (see 7.2) in
46、 the case of copra, or meal (see 7.3), or medium-sized seeds other than safflower seed, sunflower seed, soya beans or cottonseed with adherent linters, ?or 5 g to 10 g of whole seed in the case of safflower seed, sunflower seed, soya beans, cottonseed with adherent linters and small seeds. Spread th
47、e material evenly over the whole base of the vessel and close the vessel with its lid. Weigh the whole to the nearest 0,001 g. 8.1.3 Carry out these operations as quickly as possible, to avoid any appreciable change in moisture content. 8.2 Determination Place the vessel containing the test portion,
48、 with the lid removed, in the oven (see 5.5) set at 103 C ? 2 C. Close the oven. After 3 h (12 h to 16 h in the case of cottonseed with adherent linters), reckoned from the time when the temperature returns to 103 C, open the oven. Immediately close the vessel with its lid and place it in the desicc
49、ator. As soon as the vessel has cooled to laboratory temperature, weigh it to the nearest 0,001 g. Return the vessel, with the lid removed, to the oven. After 1 h, repeat the operations of closing the vessel, allowing it to cool, and weighing it. If the difference between the two weighings is equal to or less than 0,005 g (for a 5 g test portion), regard the determination as finished. If not, subject the test portion to successive 1 h periods in the oven, until the difference between two successive weighings is equal to or less than 0,005 g. N