EN ISO 24333-2009 en Cereals and cereal products - Sampling《类及谷类制品 抽样》.pdf

1、BS EN ISO24333:2009ICS 67.060NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDCereals and cerealproducts Sampling(ISO 24333:2009)Incorporating corrigendum August 2010National forewordThis British Standard is the UK implementation of EN ISO 24333:2009 incorporatin

2、g corrigendum August 2010. It supersedes BS EN ISO 13690:2007 and BS EN ISO 6644:2007 which are withdrawn.The UK participation in its preparation was entrusted to Technical Committee AW/4, Cereals and pulses.A list of organizations represented on this committee can be obtained on request to its secr

3、etary.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.BS EN ISO 24333:2009This British Standard was published under the authorit

4、y of the Standards Policy and Strategy Committee on 30 June 2010 BSI 2011Amendments/corrigenda issued since publicationDate Comments 31 January2011Implementation of CEN corrigendum August 2010;addition of text to CEN foreword and title pageISBN 978 0 580 72650 7EUROPEAN STANDARD NORME EUROPENNE EURO

5、PISCHE NORM EN ISO 24333 December 2009 ICS 67.060 English Version Cereals and cereal products - Sampling (ISO 24333:2009) Crales et produits craliers - chantillonnage (ISO 24333:2009) Getreide und Getreideerzeugnisse - Probenahme (ISO 24333:2009) This European Standard was approved by CEN on 11 Dece

6、mber 2009. 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 ob

7、tained on application to the CEN 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 CEN Mana

8、gement Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, No

9、rway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any for

10、m and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 24333:2009: ESupersedes EN ISO 6644:2007 and EN ISO 13690:2007 3 Foreword This document (EN ISO 24333:2009) has been prepared by Technical Committee ISO/TC 34 “Food products“ in collaboration with Technical Committee CEN

11、/TC 338 “Cereal and cereal products”, the secretariat of 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 June 2010, and conflicting national standards shall be withdrawn at

12、 the latest by June 2010. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the natio

13、nal standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, P

14、oland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 24333:2009 has been approved by CEN as a EN ISO 24333:2009 without any modification. This document supersedes EN ISO 6644:2007 and EN ISO 13690:2007. BS EN ISO 24333:20

15、09EN ISO 24333:2009 (E) ISO 2010 All rights reserved iiiContents Page Foreword iv Introduction.v 1 Scope1 2 Terms and definitions .1 3 General requirements .2 4 Equipment and devices 3 5 Sampling.3 5.1 General .3 5.2 Sampling of bulk products .3 5.3 Sampling of milled and other cereal products in pa

16、cked units8 6 Laboratory sample 11 6.1 Homogenization.11 6.2 Division of the aggregate sample 11 7 Packaging and labelling of samples12 7.1 General .12 7.2 Labels for samples 12 8 Shipment of samples 13 9 Sampling report .13 10 Hygiene and safety13 Annex A (informative) Examples of mechanical sampli

17、ng devices used on flowing grain 14 Annex B (informative) Examples of instruments used to sample static products and instruments used to divide samples.18 Bibliography28 BS EN ISO 24333:2009EN ISO 24333:2009 (E)iv ISO 2010 All rights reservedForeword ISO (the International Organization for Standardi

18、zation) 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 has the right to b

19、e 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. International Standa

20、rds 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 bodies for voting. Publication as an Inter

21、national 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 or all such patent rights. ISO 24333 w

22、as prepared by the European Committee for Standardization (CEN) Technical Committee CEN/TC 338, Cereal and cereal products, in collaboration with Technical Committee ISO/TC 34, Food products, Subcommittee SC 4, Cereals and pulses, in accordance with the Agreement on technical cooperation between ISO

23、 and CEN (Vienna Agreement). This first edition of ISO 24333 cancels and replaces ISO 6644:20025and ISO 13690:19997. BS EN ISO 24333:2009EN ISO 24333:2009 (E) ISO 2010 All rights reserved vIntroduction Sampling is a procedure which requires both a method and equipment that are suitable for the task.

24、 Any analysis of the characteristics of a lot and any interpretation of the results would prove futile if the sample were not representative of the lot from which it was taken. Sampling is a procedure which requires a great deal of care. It is strongly recommended that the task be entrusted to perso

25、nnel who have been trained to use the appropriate equipment. BS EN ISO 24333:2009EN ISO 24333:2009 (E)INTERNATIONAL STANDARD ISO 2010 All rights reserved 1Cereals and cereal products Sampling 1 Scope This International Standard specifies requirements for the dynamic or static sampling, by manual or

26、mechanical means, of cereals and cereal products, for assessment of their quality and condition. It is applicable to sampling for the determination of heterogeneously distributed contaminants, undesirable substances, and parameters usually homogeneously distributed like those used to assess quality

27、or compliance with specification. It can be used to determine insects in a grain lot. NOTE 1 Other methods, e.g. trapping whilst grain is in storage, are more suitable to assess pest populations. It is applicable to sampling for assessment of the quality and condition of lots of genetically modified

28、 organisms (GMO) but is inappropriate for the determination of the presence of adventitious genetically modified material in non-GM product. It is not applicable to seed grain. NOTE 2 The sampling of seed grain is governed by the rules established by the ISTA (International Seed Testing Association)

29、. NOTE 3 At the time of publication, there is no study to support the inclusion of the sampling of non-GM product in order to determine adventitious GM presence within the scope of this International Standard. 2 Terms and definitions For the purposes of this document, the following terms and definit

30、ions apply. 2.1 lot cereals identified quantity of material (cereal or cereal product) from which a sample can be taken and controlled to determine one (or several) characteristic(s) 2.2 sampling act of drawing or constituting a sample ISO 3534-2:20063, 1.3.1 2.3 increment cereals amount of material

31、 taken at one time at each individual sampling point throughout a lot NOTE Adapted from ISO 3534-2:20063, 5.2.7. BS EN ISO 24333:2009EN ISO 24333:2009 (E)2 ISO 2010 All rights reserved2.4 aggregate sample composite sample cereals aggregation of two or more increments (2.3), taken by experimental sam

32、pling (2.2) throughout a lot (2.1), combined and homogenized NOTE Adapted from ISO 3534-2:20063, 5.3.4. 2.5 laboratory sample cereals sample prepared by homogenizing and dividing an aggregate sample (2.4) for sending to the laboratory and intended for inspection or testing NOTE Adapted from ISO 6206

33、:19794, 3.2.10. 2.6 homogenization thorough blending by mechanical or manual means so that contaminants and physical properties are evenly distributed throughout the aggregate or laboratory sample 2.7 packed unit quantity of grain or milled product packed in a sack, a bag or a retail pack 2.8 sampli

34、ng error cereals that part of total estimation of error of a characteristic due to the heterogeneity of the characteristics, the nature of sampling and to known and acceptable deficiencies in the sampling plan NOTE Adapted from ISO 7002:19866, A.42. 3 General requirements 3.1 In this International S

35、tandard, sampling includes the following stages: a) taking a defined number of increments to constitute an aggregate sample; b) homogenization of the aggregate sample; c) reduction of the aggregate sample into laboratory sample(s). 3.2 Since the composition of the lots of cereals is rarely homogeneo

36、us and since certain contaminants are distributed in a non-uniform way, a sufficient number of increments shall be taken and carefully mixed to constitute an aggregate sample from which it will subsequently be possible to obtain one or several laboratory sample(s). For non-flowing commodities (stati

37、c), particular care shall be taken to ensure that these increments are distributed regularly throughout the grain mass, both at the surface and deep down. 3.3 Precautions shall be taken to ensure that all equipment used is clean, dry and free from foreign odours. The sampling procedures shall be car

38、ried out in such a way that the sampled material is protected from any source of accidental contamination caused by rain, dust, etc. 3.4 All the sampling procedures shall be carried out over a sufficiently short period of time to avoid any modification of the volatile substances in the samples. If o

39、ne of the sampling stages takes a long time, the increments, individually or combined, shall be kept in sealed containers. BS EN ISO 24333:2009EN ISO 24333:2009 (E) ISO 2010 All rights reserved 33.5 In the event of arbitration, samples shall be taken jointly by representatives of both the purchaser

40、and the vendor, or by a third party nominated by common accord. 3.6 Precautions shall be taken to guarantee the integrity of all samples between the moment they are taken and the moment they are used in the laboratory. 4 Equipment and devices There are many different types of sampling equipment or d

41、evices. The most suitable equipment should be chosen taking into account the product to be sampled, the quantity required and the containers to be used. Annex A describes the general types of mechanical sampling devices used on flowing grain, and shows illustrations of examples of such devices. Anne

42、x B gives examples of instruments used to sample static products, and examples of instruments used to divide samples. Annex A and B are not exhaustive. Mechanical sampling devices shall have suitable points of access for the examination, cleaning, maintenance, and repair of all surfaces subject to w

43、ear. The points of access should be made of materials which do not generate an electrostatic charge. For maize, suction sampling devices should have a twin bore tube with an air supply. These suction sampling devices may also be used for other cereals. 5 Sampling 5.1 General Sampling in bulk concern

44、s both the sampling of flowing cereals and the sampling of static cereals. In both cases, the sample can be taken using mechanical or manual means. Sampling from packed units (2.7) only concerns static sampling and only uses manual means. The number of increments and the masses are given in Tables 1

45、 and 2 for grain, in Tables 3 and 4 for milled and other cereal products and in Table 5 for milled and other cereal products in packed units. One laboratory sample (2.5) is required by lot or sub-lot of 1 500 t maximum. EXAMPLE For a lot of 6 000 t, analyse at least four laboratory samples. NOTE The

46、 ranges of masses indicated in Tables 1 to 5 come from ISO/TR 292639. 5.2 Sampling of bulk products 5.2.1 General Whenever possible, sampling should be carried out when the products are flowing (e.g. during loading or unloading) so that all the constituent parts of the lot have the same probability

47、of being sampled. When mechanical means are not available, implement a manual sampling plan. The methods (mechanical or manual) of taking samples from flowing lots shall be adapted to the speed at which the products are flowing (see Tables 1 and 3). For static grain, whichever method of sampling is

48、used, the increments should be taken at regular intervals over the entire width and depth, up to 9 m. Sample lots of bulk grain which are more than 9 m deep when they are flowing. BS EN ISO 24333:2009EN ISO 24333:2009 (E)4 ISO 2010 All rights reservedFor lorries and trailers, it is recommended that

49、samples be taken statically. In order for the aggregate sample to be representative, the number of increments shall be as high as possible. Tables 1 to 4 specify the minimum numbers of increments to be carried out in different situations. 5.2.2 Sampling of flowing bulk products 5.2.2.1 General. Since the characteristics and make-up of the lot can vary, the increments shall be taken from the whole lot, i.e. as long as the material is flowing. 5.2.2.2 Mechanical sampling. Adjust the equipment so that the size of the increme