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1、BRITISH STANDARD BS EN ISO 658:2002 Oilseeds Determination of content of impurities The European Standard EN ISO 658:2002 has the status of a British Standard ICS 67.200.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 1
2、5:08:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 658:2002 This British Standard, having been prepared under the direction of the Consumer Products and Services Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 23 May
3、 2002 BSI 23 May 2002 ISBN 0 580 39104 3 National foreword This British Standard is the official English language version of EN ISO 658:2002. It is identical with ISO 658:2002. It supersedes BS EN ISO 658:1995 (also numbered BS 4289-2:1995) which is withdrawn. The UK participation in its preparation
4、 was entrusted to Technical Committee AW/307, Oilseeds, animal and vegetable fats and oils and their by-products, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement
5、 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” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport t
6、o 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 obligations. aid enquirers to understand the text; present to the responsible international
7、/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. Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title
8、 page, the EN ISO foreword page, the ISO title page, pages ii to iv, pages 1 to 10, the Annex ZA page and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun
9、sheffieldun, na, Sun Nov 19 15:08:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 658 April 2002 ICS 67.200.20Supersedes EN ISO 658:1995 English version Oilseeds - Determination of content of impurities (ISO 658:2002) Graines olagineuses - Dterm
10、ination de la teneur en impurets (ISO 658:2002) lsamen - Bestimmung des Gehaltes an Verunreinigungen (ISO 658:2002) This European Standard was approved by CEN on 6 March 2002. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this Eur
11、opean Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Management Centre or to any CEN member. This European Standard exists in three official versions (English,
12、 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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic,
13、Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart
14、, 36 B-1050 Brussels 2002 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 658:2002 E Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 15:08:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI I NESO 56:8002( 2E) 2 CORRECTED 2002
15、-05-15 Foreword This document (ISO 658:2002) has been prepared by Technical Committee ISO/TC 34 “Agricultural food products“ in collaboration with Technical Committee CEN/TC 307 “Oilseeds, vegetable and animal fats and oils and their by-products - Methods of sampling and analysis“, the secretariat o
16、f which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by October 2002, and conflicting national standards shall be withdrawn at the latest by October 2002. This document supersede
17、s EN ISO 658:1995. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta
18、, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the International Standard ISO 658:2002 has been approved by CEN as a European Standard without any modifications. NOTE Normative references to International Standards are listed in ann
19、ex ZA (normative). EN ISO 658:2002 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 15:08:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Reference number ISO 658:2002(E) OSI 2002 INTERNATIONAL STANDARD ISO 658 Third edition 2002-04-01 Oilseeds Determination of content of impurities Graines olag
20、ineuses Dtermination de la teneur en impurets EN ISO 658:2002 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 15:08:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI IS:856 O2002(E) lcsid FDParemi ihTs PDF file mac ytnoaie nmt deddebyfepca.se In ccaocnadrw eith Aebods licsneilop gnic,y this file
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24、e fomr yb ro nam y,snae lecetrinoc m roecinahcal, inclidutohp gnocpoiym dna gnicrfoilm, wittuoh repmissii non writif gnrom ietreh ISa Ot tserdda ehs lebwo I roSOs membre ydob in teh ctnuoo yrf ttseuqer ehe.r ISO cirypothg fofice saCe tsopale 65 eneG 1121-HC02 av leT. 14 + 10 947 22 11 xaF 90 947 22
25、14 + 74 E-mail cirypothgiso.ch Web ww.wiso.ch ii I SO 2002 All irthgs ersedevr EN ISO 658:2002 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 15:08:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI IS:856 O2002(E) I SO 2002 All irthgs ersedevr iii Contents Page Foreword.iv 1 Scope1 2 Normative r
26、eferences1 3 Terms and definitions .1 4 Principle2 5 Apparatus.2 6 Sampling.2 7 Preparation of test sample2 8 Procedure.2 8.1 Test portion3 8.2 Determination.3 9 Expression of results4 9.1 Method of calculation4 10 Precision.7 10.1 Interlaboratory test7 10.2 Repeatability 7 10.3 Reproducibility.7 11
27、 Test report8 Annex A (informative) Results of interlaboratory trial 9 Bibliography10 EN ISO 658:2002 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 15:08:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI IS:856 O2002(E) iv I SO 2002 All irthgs ersedevr Foreword ISO (the International Organizati
28、on 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 has been established ha
29、s 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 standardization. Inte
30、rnational Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. 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. Publica
31、tion 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 be the subject of patent rights. ISO shall not be held responsible for identifying any or all s
32、uch patent rights. ISO 658 was prepared by Technical Committee ISO/TC 34, Food products, Subcommittee SC 2, Oleaginous seeds and fruits. This third edition cancels and replaces the second edition (ISO 658:1988), which has been technically revised. Annex A of this International Standard is for inform
33、ation only. EN ISO 658:2002 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 15:08:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI INTENRATIONAL TSANDADR IS:856 O2002(E) I SO 2002 All irthgs ersedevr 1 Oilseeds Determination of content of impurities 1 Scope This International Standard specifies
34、a method for the determination of the impurities content in oilseeds used as primary industrial materials. It also defines the various categories of what are usually understood to be impurities. 2 Normative references The following normative documents contain provisions which, through reference in t
35、his text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the m
36、ost recent editions of the normative documents 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 Standards. ISO 659, Oilseeds Determination of oil content (Reference me
37、thod) ISO 664, Oilseeds Reduction of laboratory sample to test sample 3 Terms and definitions For the purposes of this International Standard, the following terms and definitions apply. 3.1 impurities in oilseeds all foreign matter, organic and inorganic, other than seeds of the species under consid
38、eration 3.2 fines in oilseeds particles passing through the sieves of aperture sizes given in Table 1, according to the species being analysed NOTE In the case of groundnuts, meal from the seeds contained in the fines is not regarded as an impurity. 3.3 non-oleaginous impurities non-oleaginous forei
39、gn bodies, fragments of stalks, leaves and all other non-oleaginous parts belonging to the oleaginous seed analysed, retained by the sieves of aperture sizes given in Table 1 EXAMPLES Bits of wood, pieces of metal, stones, seeds of non-oleaginous plants, and bits of shell, loose or adhering to palm
40、kernels. NOTE In the case of seeds sold in their shells, for example sunflower seeds (Helianthus annuus L.) or pumpkin seeds (Cucurbita pepo L.), the loose shells are regarded as impurities only if their proportion is larger than that of the corresponding kernels present in the same sample. 3.4 olea
41、ginous impurities oilseeds other than those of the species under consideration EN ISO 658:2002 1 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 15:08:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI IS:856 O2002(E) 2 I SO 2002 All irthgs ersedevr 4 Principle The impurities are separated, by sie
42、ving and sorting, into three categories as follows: fines; non-oleaginous impurities; oleaginous impurities. The mass of total impurities is determined or, on request, the mass of each category of impurity. 5 Apparatus 5.1 Sieves, having round holes with diameters as given in Table 1. 5.2 Tweezers,
43、or other suitable instruments. 5.3 Analytical balance, capable of being read to the nearest 0,005 g. 5.4 Sample dividers, capable of taking 10 g sample aliquots of small seeds and 100 g sample aliquots of sunflower seeds and soyabeans. Table 1 Aperture sizes of sieves Nature of product Aperture diam
44、eter mm Copra 2,0 Medium and larger sized seeds (see ISO 664) 1,0 Small seeds (see ISO 664) 0,5 6 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 the laboratory receive a sample which is truly
45、representative and has not been damaged or changed during transport or storage. 7 Preparation of test sample Prepare the test sample in accordance with ISO 664. 8 Procedure NOTE If it is required to check whether the repeatability limits (10.2) are met, carry out two single determinations in accorda
46、nce with 8.2.2 to 8.2.3. EN ISO 658:2002 2 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 15:08:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI IS:856 O2002(E) I SO 2002 All irthgs ersedevr 3 8.1 Test portion Take as the test portion a complete test sample (see clause 7). For a complete analys
47、is, two or four test samples are necessary (see 10.2). Weigh the test portion to the nearest 0,1 g. 8.2 Determination 8.2.1 General The determination of impurities content shall be carried out sufficiently quickly to avoid any appreciable change in the moisture content of the seed. 8.2.2 Separation
48、of fines Separate the fines quantitatively by sieving the test portion on the sieve (see 5.1) and collecting them. In the case of groundnuts, collect the total fines thus obtained, which include non-oleaginous fines and fines from the seed. Weigh them to the nearest 0,01 g and determine their oil co
49、ntent by the method specified in ISO 659. Determine also the oil content of the pure seeds by the method specified in ISO 659 in order to calculate the content of non-oleaginous fines. 8.2.3 Separation of oleaginous and non-oleaginous impurities 8.2.3.1 Copra and medium and larger sized seeds, apart from sunflower seeds and soya beans In the material retained by the sieve (see 5.1), separate, by means of tweezers or any other suitable instrument (see 5.2), the non-oleaginous impurities (see 3.3), if necessary detaching bi