DIN EN ISO 24333-2010 Cereals and cereal products - Sampling (ISO 24333 2009) German version EN ISO 24333 2009《谷类及谷类制品 抽样》.pdf

1、April 2010 Translation by DIN-Sprachendienst.English price group 16No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS

2、67.060!$aI“1626138www.din.deDDIN EN ISO 24333Cereals and cereal products Sampling (ISO 24333:2009)English translation of DIN EN ISO 24333:2010-04Getreide und Getreideerzeugnisse Probenahme (ISO 24333:2009)Englische bersetzung von DIN EN ISO 24333:2010-04Crales et produits craliers chantillonnage (IS

3、O 24333:2009)Traduction anglaise de DIN EN ISO 24333:2010-04SupersedesDIN EN ISO 6644:2007-05 andDIN EN ISO 13690:2007-05www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 34 pages04.10 DIN EN ISO 24333:2010-04 2 A comma is used as the dec

4、imal marker. National foreword This standard has been prepared by Technical Committee ISO/TC 34 “Food products” (Secretariat: AFNOR, France) in collaboration with Technical Committee CEN/TC 338 “Cereals and cereal products” (Secretariat: AFNOR, France). The responsible German body involved in its pr

5、eparation was the Normenausschuss Lebensmittel und landwirtschaftliche Produkte (Food and Agricultural Products Standards Committee), Working Committee NA 057-05-06 AA Getreide und Getreideerzeugnisse. It should be noted that this standard, DIN EN ISO 24333:2010-04, supersedes the standards DIN EN I

6、SO 6644:2007-05 and DIN EN ISO 13690:2007-05. Amendments This standard differs from DIN EN ISO 6644:2007-05 and DIN EN ISO 13690:2007-05 as follows: a) This standard includes both the requirements for the automatic sampling of cereals or of milled cereal products according to DIN EN ISO 6644 and the

7、 requirements for the sampling of static batches of cereals, pulses and milled products according to DIN EN ISO 13690. b) This standard is applicable to sampling for the determination of heterogeneously distributed contaminants, undesirable substances, and parameters usually homogeneously distribute

8、d like those used to assess quality or compliance with specification. It can be used to determine insects in a grain lot. c) The standard corresponds to the state of the art in sampling of cereals and cereal products. Previous editions DIN EN ISO 6644: 2007-05 DIN EN ISO 13690: 2007-05 EUROPEAN STAN

9、DARD NORME EUROPENNE EUROPISCHE 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 a

10、pproved by CEN on 11 December 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 nat

11、ional standards may be obtained 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

12、 notified to the CEN Management 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, Luxembour

13、g, Malta, Netherlands, Norway, 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 o

14、f exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 24333:2009: EContents DIN EN ISO 24333:2010-04 EN ISO 24333:2009 (E) 2 Page Foreword3 Introduction .4 1 Scope 5 2 Terms and definitions .5 3 General requirements6 4 Equipment and devices.7 5 Samp

15、ling.7 5.1 General7 5.2 Sampling of bulk products .7 5.3 Sampling of milled and other cereal products in packed units . 12 6 Laboratory sample 15 6.1 Homogenization 15 6.2 Division of the aggregate sample . 15 7 Packaging and labelling of samples. 16 7.1 General. 16 7.2 Labels for samples . 16 8 Shi

16、pment of samples 17 9 Sampling report 17 10 Hygiene and safety . 17 Annex A (informative) Examples of mechanical sampling devices used on flowing grain 18 Annex B (informative) Examples of instruments used to sample static products and instruments used to divide samples 22 Bibliography. 32 Foreword

17、in collaboration with Technical Committee CEN/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 conflic

18、ting national standards shall be withdrawn at 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 th

19、e CEN/CENELEC Internal Regulations, the national 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, Lithuan

20、ia, Luxembourg, Malta, Netherlands, Norway, Poland, 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 (EN ISO 24333:2009) has

21、been prepared by Technical Committee ISO/TC 34 “Food products” DIN EN ISO 24333:2010-04 EN ISO 24333:2009 (E) 3 Introduction Sampling is a procedure which requires both a method and equipment that are suitable for the task. Any analysis of the characteristics of a lot and any interpretation of the r

22、esults 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 personnel who have been trained to use the appropriate equipment. DIN EN ISO 24333

23、:2010-04 EN ISO 24333:2009 (E) 4 1 Scope This International Standard specifies requirements for the dynamic or static sampling, by manual or mechanical means, of cereals and cereal products, for assessment of their quality and condition. It is applicable to sampling for the determination of heteroge

24、neously distributed contaminants, undesirable substances, and parameters usually homogeneously distributed like those used to assess quality 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

25、suitable to assess pest populations. It is applicable to sampling for assessment of the quality and condition of lots of genetically modified organisms (GMO) but is inappropriate for the determination of the presence of adventitious genetically modified material in non-GM product. It is not applicab

26、le to seed grain. NOTE 2 The sampling of seed grain is governed by the rules established by the ISTA (International Seed Testing Association). 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 presenc

27、e within the scope of this International Standard. 2 Terms and definitions For the purposes of this document, the following terms and definitions 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 sev

28、eral) 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 taken at one time at each individual sampling point throughout a lot NOTE Adapted from ISO 3534-2:20063, 5.2.7. DIN EN ISO 24333:2010-04 EN ISO 24333:2009 (E)

29、 5 2.4 aggregate sample composite sample cereals aggregation of two or more increments (2.3), taken by experimental sampling (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

30、 aggregate sample (2.4) for sending to the laboratory and intended for inspection or testing NOTE Adapted from ISO 6206:19794, 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 la

31、boratory sample 2.7 packed unit quantity of grain or milled product packed in a sack, a bag or a retail pack 2.8 sampling 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 defic

32、iencies in the sampling plan NOTE Adapted from ISO 7002:19866, A.42. 3 General requirements 3.1 In this International Standard, 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

33、of the aggregate sample into laboratory sample(s). 3.2 Since the composition of the lots of cereals is rarely homogeneous 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 w

34、hich it will subsequently be possible to obtain one or several laboratory sample(s). For non-flowing commodities (static), 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 t

35、aken to ensure that all equipment used is clean, dry and free from foreign odours. The sampling procedures shall be carried 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

36、 out over a sufficiently short period of time to avoid any modification of the volatile substances in the samples. If one of the sampling stages takes a long time, the increments, individually or combined, shall be kept in sealed containers. DIN EN ISO 24333:2010-04 EN ISO 24333:2009 (E) 6 3.5 In th

37、e event of arbitration, samples shall be taken jointly by representatives of both the purchaser 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 t

38、he laboratory. 4 Equipment and devices There are many different types of sampling equipment or devices. 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 s

39、ampling devices used on flowing grain, and shows illustrations of examples of such devices. Annex 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 poin

40、ts of access for the examination, cleaning, maintenance, and repair of all surfaces subject to wear. 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 samp

41、ling devices may also be used for other cereals. 5 Sampling 5.1 General Sampling in bulk concerns 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 sa

42、mpling and only uses manual means. The number of increments and the masses are given in Tables 1 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

43、 500 t maximum. EXAMPLE For a lot of 6 000 t, analyse at least four laboratory samples. NOTE The 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. duri

44、ng loading or unloading) so that all the constituent parts of the lot have the same probability 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 t

45、he products are flowing (see Tables 1 and 3). For static grain, whichever method of sampling is 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. DIN EN ISO 24333:2010-04

46、 EN ISO 24333:2009 (E) 7 For lorries and trailers, it is recommended that 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

47、 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 increm

48、ents or the frequency of sampling can be varied over a wide range. A series of fixed-size increments shall be taken at pre-determined intervals according to the flow and in such a way that each part of the lot has the same chance of entering the sampling device intake. EXAMPLE Crosscut sampling devi

49、ces meet this requirement irrespective of the type of flow. 5.2.2.3 Manual sampling. Take increments at regular intervals. 5.2.3 Sampling of static bulk products For static sampling, the means and methods of taking samples shall take into account the height of the product to be sampled. Up to a depth of 2 m, manual probes can be used. Up to a depth of 2,5 m, mechanical sampling devices can be used if the principle of sampling according to which they function does not create any segregation at the probe tube intake and does not cause damage t