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1、BS EN 15587:2008 ICS 67.060 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BRITISH STANDARD Cereals and cereal products - Determination of Besatz in wheat (Triticum aestivum L.), durum wheat (Triticum durum Desf.), rye (Secale cereale L.) and feed barley (Hordeum vulgare L.)
2、Licensed Copy: London South Bank University, South Bank University, 31/01/2009 03:19, Uncontrolled Copy, (c) BSI This British Standard was published under the authority of the Standards Policy and Strategy Committee on 3 2008 BSI 2008 ISBN 978 0 580 57709 3 Amendments/corrigenda issued since publica
3、tion DateComments BS EN 15587:2008 National foreword This British Standard is the UK implementation of EN 15587:2008. 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 reques
4、t to its secretary. 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. 1 December Licensed Copy: London South Bank University, So
5、uth Bank University, 31/01/2009 03:19, Uncontrolled Copy, (c) BSI BS EN 15587:2008 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 15587 July 2008 ICS 67.060 English Version Cereals and cereal products - Determination of Besatz in wheat (Triticum aestivum L.), durum wheat (Triticum durum Desf.)
6、, rye (Secale cereale L.) and feed barley (Hordeum vulgare L.) Crales et produits craliers - Dtermination du pourcentage dimpurets dans le bl tendre (Triticum aestivum L.), le bl dur (Triticum durum Desf.), le seigle (Secale cereale L.) et lorge fourragre (Hordeum vulgare L.) Getreide und Getreideer
7、zeugnisse - Bestimmung von Besatz in Weizen (Triticum aestivum L.), Hartweizen (Triticum durum Desf.), Roggen (Secale cereale L.) und Futtergerste (Hordeum vulgare L.) This European Standard was approved by CEN on 21 June 2008. CEN members are bound to comply with the CEN/CENELEC Internal Regulation
8、s 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 obtained on application to the CEN Management Centre or to any CEN member. This Europ
9、ean 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 Management Centre has the same status as the official versions. CEN members are the nat
10、ional standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and
11、 United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2008 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15587:
12、2008: E Licensed Copy: London South Bank University, South Bank University, 31/01/2009 03:19, Uncontrolled Copy, (c) BSI BS EN 15587:2008 EN 15587:2008 (E) 2 Contents Page Foreword3 1 Scope 4 2 Normative references4 3 Terms and definitions .4 4 Principle7 5 Apparatus.7 6 Sampling.7 7 Procedure (see
13、diagram in Annex B).7 8 Expression of results 8 9 Precision.9 10 Test report10 Annex A (informative) Schematic summary on Besatz.12 Annex B (normative) Diagram of procedure.13 Annex C (informative) Example of calculation .14 Annex D (informative) Results of interlaboratory test.15 Bibliography26 Lic
14、ensed Copy: London South Bank University, South Bank University, 31/01/2009 03:19, Uncontrolled Copy, (c) BSI BS EN 15587:2008 EN 15587:2008 (E) 3 Foreword This document (EN 15587:2008) has been prepared by Technical Committee CEN/TC 338 “Cereals and cereal products”, the secretariat of which is hel
15、d 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 January 2009, and conflicting national standards shall be withdrawn at the latest by January 2009. Attention is drawn to the possibility
16、 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 national standards organizations of the following countries are boun
17、d 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, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Sw
18、itzerland and the United Kingdom. Licensed Copy: London South Bank University, South Bank University, 31/01/2009 03:19, Uncontrolled Copy, (c) BSI BS EN 15587:2008 EN 15587:2008 (E) 4 1 Scope This European Standard specifies the term Besatz (impurities) and describes methods for the determination of
19、 its components. The term Besatz is used as a parameter for certain quality aspects in common wheat (Triticum aestivum L.), durum wheat (Triticum durum Desf.), rye (Secale cereale L.) and feed barley (Hordeum vulgare L.). 2 Normative references The following referenced documents are indispensable fo
20、r 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. EN ISO 6644, Flowing cereals and milled cereal products Automatic sampling by mechanical means (ISO 6644
21、:2002) EN ISO 13690, Cereals, pulses and milled products Sampling of static batches (ISO 13690:1999) prEN ISO 24333, Cereals and cereal products Sampling (ISO/DIS 24333:2006) ISO 5223, Test sieves for cereals 3 Terms and definitions For the purposes of this document, the following terms and definiti
22、ons apply. 3.1 Besatz all matter of a sample of grain other than the basic cereal of unimpaired quality NOTE 1 It comprises the four fractions: broken grains, grain impurities, sprouted grains and miscellaneous impurities. NOTE 2 Live pests are not considered as Besatz. They are specified as a separ
23、ate criterion. NOTE 3 A schematic summary on Besatz is given in Annex A. NOTE 4 Pictures of examples are given in 9. 3.2 broken grains all grains belonging to the basic cereal not damaged by pests and whose endosperm is partially uncovered, including grains damaged by threshing and grains from which
24、 the germ has been removed 3.3 grain impurities fraction consisting of shrivelled grains, other cereals, grains damaged by pests, grains in which the germ is discoloured, mottled grains and grains overheated during drying Licensed Copy: London South Bank University, South Bank University, 31/01/2009
25、 03:19, Uncontrolled Copy, (c) BSI BS EN 15587:2008 EN 15587:2008 (E) 5 3.3.1 shrivelled grains grains which after elimination of all other matter defined in this European standard pass through 20 mm slotted sieves with widths of the following dimensions: common wheat 2,0 mm durum wheat 1,9 mm rye 1
26、,8 mm feed barley 2,2 mm feed barley with moisture content below 12,5% 2,0 mm and grains damaged by frost and unripe grains (green) NOTE Frost damaged kernels can show the following appearance: black or brown discoloration, bleached or blistered, distinctly wax-like or candied surface. Frequently th
27、ey have dark stripes showing through the sides of the kernel. 3.3.2 other cereals grains and their impurities consisting of grains which do not belong to the species of grain sampled or which are too unsound for being identified NOTE As durum wheat and common wheat are two different species, all com
28、mon wheat grains and their grain dockage components are classified as other cereals and vice versa. 3.3.3 grains damaged by pests grains which show visible damage owing to attack by insects, rodents, mites or other pests NOTE Grains attacked by wheat midge are considered unsound grains (3.5.2) only
29、when more than half the surface of the grain is coloured grey to black as a result of secondary cryptogamic attack. Where discoloration covers less than half the surface of the grain, they are classed with grains damaged by pests. 3.3.4 grains with discoloured germ, mottled grains grains either a) w
30、ith discoloured germ in which the tegument covering the germ is coloured brown to brownish black and in which the germ is normal and not sprouted NOTE 1 If the germ is coloured only with one little spot, the grain is considered as sound or b) mottled which show a brown to brownish black discoloratio
31、n elsewhere than on the germ itself and in particular in the crease NOTE 2 If the coloration is only in the crease, grains are considered as mottled only if the spot covers more than of the length of the crease. NOTE 3 This fraction only exists for Durum wheat. Licensed Copy: London South Bank Unive
32、rsity, South Bank University, 31/01/2009 03:19, Uncontrolled Copy, (c) BSI BS EN 15587:2008 EN 15587:2008 (E) 6 3.3.5 grains overheated during drying grains showing external signs of scorching but of which the kernels are sound NOTE Grains showing external signs of scorching and of which the kernels
33、 are coloured yellowish-grey to brownish- black are considered unsound. 3.4 sprouted grains grains in which the radicle or plumule is clearly visible to the naked eye NOTE 1 Account should be taken of the general appearance of the sample when its content of sprouted grains is assessed. NOTE 2 In som
34、e cereal classes the germ is protuberant, e.g. in durum wheat, and the germ tegument splits when the batch of cereals is shaken. These grains resemble sprouted grains but must not be included in that group. Sprouted grains are only those where the germ has undergone clearly visible changes which mak
35、e it easy to distinguish the sprouted grain from the normal grain. 3.5 miscellaneous impurities (synonymous: Schwarzbesatz) fraction consisting of extraneous seeds, unsound grains, extraneous matter, husks, ergot, smutty grains and impurities of animal origin 3.5.1 extraneous seeds seeds of plants,
36、whether or not cultivated, other than cereals NOTE 1 They comprise noxious and not noxious seeds. Noxious seeds means seeds which are toxic to humans and animals. This group also includes seeds hampering or complicating the cleaning and milling of cereals and seeds affecting the quality of products
37、processed from cereals. NOTE 2 In some cases it may be necessary to distinguish between noxious seeds and not noxious seeds. An indicative list of noxious seeds is given in Annex A of ISO 7970:2000 4. 3.5.2 unsound grains grains rendered unfit for human consumption and, as regards feed grain, for fe
38、ed consumption, owing to putrefaction, mildew, grains affected with fungi, or bacterial or other causes NOTE 1 unsound grains also include grains damaged by spontaneous heat generation or too extreme heating during drying which are fully grown grains in which the tegument is coloured greyish-brown t
39、o black while the cross-section of the kernel is coloured yellowish-grey to brownish-black. NOTE 2 Grains attacked by wheat midge shall be considered unsound grains only when more than half the surface of the grain is coloured grey to black as a result of secondary cryptogamic attack. Where discolor
40、ation covers less then half the surface of the grain, they must be classed with grains damaged by pests. 3.5.3 extraneous matter all matter in a sample of cereals retained by a sieve with apertures of 3,5 mm and passing through a sieve with apertures of 1,0 mm, and stones, sand, fragments of straw a
41、nd similar impurities in the sample which pass through a sieve with apertures of 3,5 mm and are retained by a sieve with apertures of 1,0 mm. NOTE Other cereals and particularly large grains of the basic cereal and ergot which are bigger than 3,5 mm are not extraneous matter. 3.5.4 husks glumes and
42、grain husks Licensed Copy: London South Bank University, South Bank University, 31/01/2009 03:19, Uncontrolled Copy, (c) BSI BS EN 15587:2008 EN 15587:2008 (E) 7 3.5.5 ergot sclerotia of Claviceps purpurea 3.5.6 bunted grains grains filled with a fetid-smelling dust comprising the spores of smuts (U
43、stilago spp.) or brown-black spores of bunt (Tilletia spp.) 3.5.7 impurities of animal origin impurities originating from animals such as feathers, hairs, excrements, dead insects and fragment of insects 4 Principle The principle of this method is to separate all the groups of Besatz, defined under
44、3.1, from the normal basic grains by sieving and manual selection. 5 Apparatus 5.1 Sample divider 5.2 Balance, capable to weighing to the nearest 0.01 g 5.3 Sieves machine fitted with a cover and a receiver, the slot-widths 3,5 mm 20,0 mm, 2,2 mm 20,0 mm, 2,0 mm 20,0 mm, 1,9 mm 20,0 mm, 1,8 mm 20,0
45、mm, 1,0 mm 20,0 mm, in accordance with the specification of ISO 5223 5.4 Sieving machine allowing a forceful horizontal backward and forward movement of the sieves, e.g. vibrator base with mounted sieves, or a shaking sieve 5.5 Magnifying glass, illuminated 5.6 Forceps or horn spatula 5.7 Pots, for
46、retaining components 6 Sampling It is important the laboratory receive a sample which is truly representative and has not been damaged or changed during transport and storage. Sampling is not part of the method specified in this International Standard. Recommended sampling methods are given in EN IS
47、O 6644, EN ISO 13690 and prEN ISO 24333. 7 Procedure (see diagram in Annex B) Prepare by division a representative sample of around 250 g (a) and weigh it to the nearest 0,1 g. This sample is sieved on a sieve column (one above with an aperture of 3,5 mm and the second under with an aperture of 1,0
48、mm) for 30 s either with a sieving machine (5.4), or by hand. If sieving is performed by hand, it Licensed Copy: London South Bank University, South Bank University, 31/01/2009 03:19, Uncontrolled Copy, (c) BSI BS EN 15587:2008 EN 15587:2008 (E) 8 must consist of horizontal movements parallel to the
49、 length of the slots (around one backward and forward movement per second). The matter retained by the sieve with slotted perforations of 3,5 mm (5.3) and that passed through the sieves with slotted perforations of 1,0 mm (5.3), except other cereals and particularly large grains of the basic cereal and ergot, shall be weighed together and regarded as extraneous matter. Stones, mud balls, straws, chaff and similar impurities from the overtails of the 1,0 mm slotted sieve (5.3) have to be picked out. Both fractions are weighted and
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