SIST EN 16378:2013
(Main)Cereals - Determination of impurities content in maize (Zea mays, L.) and sorghum (Sorghum bicolor, L.)
Cereals - Determination of impurities content in maize (Zea mays, L.) and sorghum (Sorghum bicolor, L.)
This European Standard specifies the term Besatz (impurities) and the method for the determination of its components. The term Besatz is used as a parameter for certain quality aspects in maize (Zea mays L.) and sorghum (Sorghum bicolor L.). This method has been validated in an interlaboratory study via the analysis of samples containing natural amount of impurities, ranging from: - 0,0 % to 2,7 % for broken grains; - 0,2 % to 3,5 % for grains impurities; - 0,5 % to 3,3 % for miscellaneous impurities; - 1,8 % to 8,7 % for total impurities. For further information on the validation, see Annex D.
Getreide - Bestimmung von Besatz in Mais (Zea mays, L.) und Hirse (Sorghum bicolor, L.)
Diese Europäische Norm legt den Begriff Besatz fest und beschreibt Verfahren zur Bestimmung seiner Bestandteile. Der Begriff Besatz wird als ein Parameter für bestimmte Qualitätsaspekte von Mais (Zea mays L.) und Sorghum (Sorghum bicolor L.) verwendet.
Dieses Verfahren wurde in einem Ringversuch validiert mit Hilfe der Untersuchung von Proben, die natürliche Mengen an Besatz enthalten, im Bereich von:
0,0 % bis 2,7 % bei Bruchkorn;
0,2 % bis 3,5 % bei Kornbesatz;
0,5 % bis 3,3 % bei Schwarzbesatz;
1,8 % bis 8,7 % bei Gesamt Besatz.
Siehe Anhang D für weitere Informationen zur Validierung.
Céréales - Détermination de la teneur en impuretés dans le maïs (Zea mays, L.) et le sorgho (Sorghum bicolor, L.)
La présente Norme européenne définit le terme « impuretés» et décrit des méthodes de détermination de ses composants. Le terme "impuretés" est utilisé comme un paramètre pour certains aspects qualitatifs du maïs (Zea mays L.) et du sorgho (Sorghum bicolor L.).
Cette méthode a été validée dans le cadre d'une étude interlaboratoires via l'analyse d'échantillons contenant une quantité naturelle d'impuretés, allant de :
0,0 % à 2,7 % pour les grains brisés
0,2 % à 3,5 % pour les impuretés constituées par des grains
0,5 % à 3,3 % pour les impuretés diverses
1,8 % à 8,7 % pour les impuretés totales
Pour de plus amples informations sur la validation, voir l’Annexe D.
Žito - Določanje nečistoč v koruzi (Zea mays, L.) in prosu (Sorghum bicolor, L.)
Ta evropski standard določa nečistoče in opisuje metode za določanje delov nečistoč. Izraz »nečistoče« se uporablja kot parameter za nekatere vidike kakovosti pri koruzi (Zea mays L.) in prosu (Sorghum bicolor L). Ta metoda je bila validirana z medlaboratorijsko študijo prek analize vzorcev, ki so vsebovali naravno količino nečistoč od: – od 0,0 % do 2,7 % počenih zrn; od 0,2 % do 3,5 % nečistoč zrn; – od 0,5 % do 3,3 % drugih nečistoč; – od 1,8 % do 8,7 % vseh nečistoč. Za več informacij glede validacije glejte dodatek D.
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Getreide - Bestimmung von Besatz in Mais (Zea mays, L.) und Hirse (Sorghum bicolor, L.)Céréales - Détermination de la teneur en impuretés dans le maïs (Zea mays, L.) et le sorgho (Sorghum bicolor, L.)Cereals - Determination of impurities content in maize (Zea mays, L.) and sorghum (Sorghum bicolor, L.)67.060QMLKCereals, pulses and derived productsICS:Ta slovenski standard je istoveten z:EN 16378:2013SIST EN 16378:2013en,fr,de01-december-2013SIST EN 16378:2013SLOVENSKI
STANDARD
SIST EN 16378:2013
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16378
August 2013 ICS 67.060 English Version
Cereals - Determination of impurities content in maize (Zea mays, L.) and sorghum (Sorghum bicolor, L.)
Céréales - Détermination de la teneur en impuretés dans le maïs (Zea mays, L.) et le sorgho (Sorghum bicolor, L.)
Getreide - Bestimmung von Besatz in Mais (Zea mays, L.) und Hirse (Sorghum bicolor, L.) This European Standard was approved by CEN on 19 July 2013.
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 obtained on application to the CEN-CENELEC 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-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 16378:2013: ESIST EN 16378:2013
EN 16378:2013 (E) 2 Contents Page Foreword . 3 1 Scope . 4 2 Normative references . 4 3 Terms and definitions . 4 4 Principle. 6 5 Apparatus and equipment . 6 6 Sampling . 6 7 Procedure . 6 8 Expression of results . 7 9 Precision . 8 10 Test report . 9 Annex A (informative)
Schematic summary on Besatz . 11 Annex B (informative)
Diagram of procedure . 12 Annex C (informative)
Example of calculation . 13 Annex D (informative)
Results of interlaboratory tests . 14 Bibliography. 19
SIST EN 16378:2013
EN 16378:2013 (E) 3 Foreword This document (EN 16378:2013) has been prepared by 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 February 2014, and conflicting national standards shall be withdrawn at the latest by February 2014. 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 national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 16378:2013
EN 16378:2013 (E) 4 1 Scope This European Standard specifies the term Besatz (impurities) and the method for the determination of its components. The term Besatz is used as a parameter for certain quality aspects in maize (Zea mays L.) and sorghum (Sorghum bicolor L.). This method has been validated in an interlaboratory study via the analysis of samples containing natural amount of impurities, ranging from: 0,0 % to 2,7 % for broken grains; 0,2 % to 3,5 % for grains impurities; 0,5 % to 3,3 % for miscellaneous impurities; 1,8 % to 8,7 % for total impurities. For further information on the validation, see Annex D. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 5223, Test sieves for cereals 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 Besatz all matters of a sample of grain other than the basic cereal of unimpaired quality Note 1 to entry: It comprises the four fractions: broken grains (3.2), grain impurities (3.3), sprouted grains (3.4) and miscellaneous impurities (3.5). Note 2 to entry: The sum of the four fractions is also called Total Besatz. Note 3 to entry: Live pests are not considered as Besatz. They are specified as a separate criterion. Note 4 to entry: A schematic summary on Besatz is given in Annex A. 3.2 broken grains grains or pieces of grains which pass through a sieve with a circular mesh of: 4,5 mm in diameter for maize; 1,8 mm in diameter for sorghum 3.3 grain impurities elements consisting of other cereals, grains damaged by pests, grains overheated during drying SIST EN 16378:2013
EN 16378:2013 (E) 5 3.3.1 other cereals cereal grains and their impurities consisting of grains which do not belong to the species of grain sampled 3.3.2 grains damaged by pests grains which show visible damage owing to attack by insects, rodents, mites or other pests 3.3.3 grains overheated by drying grains which have been overheated and have a coloration of the cross section of the germ darker than the colour standard and in which the kernel is sound Note 1 to entry: For determination of such grains, it is recommended to use the colour standard (5.8) to compare with the colour of the section of the cut germ. 3.4 sprouted grains grains in which the radical or plumule is clearly visible to the naked eye 3.5 miscellaneous impurities elements consisting of extraneous seeds, unsound grains, extraneous matter and impurities of animal origin 3.5.1 extraneous seeds seeds of plants, whether or not cultivated, other than cereals Note 1 to entry: They comprise noxious and non-noxious seeds. The term “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 processed from cereals. Note 2 to entry: In some cases it may be necessary to distinguish between noxious seeds and non-noxious seeds. An indicative list of noxious seeds is given in ISO 7970:2000, Annex A [5]. 3.5.2 unsound grains grains rendered unfit for human consumption and, as regards feed grain, for feed consumption, owing to putrefaction, mildew, grains affected with fusariosis, or bacterial or other causes Note 1 to entry: 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 to black while the cross-section of the kernel is coloured-yellowish grey to brownish-black. 3.5.3 extraneous matter all matters in a sample of grains that passing through a sieve with apertures of 1,0 mm are considered extraneous Note 1 to entry: Extraneous matter also includes stones, sand, fragments of straw, cob fragments and similar impurities in the samples which are retained by a sieve with apertures of 1,0 mm. 3.5.4 impurities of animal origin impurities originating from animals such as feathers, hairs, excrements, dead insects and fragment of insects SIST EN 16378:2013
EN 16378:2013 (E) 6 4 Principle The principle of this method is to separate all the groups of impurities defined in 3.1, from the normal basic grains by sieving and manual selection. 5 Apparatus and equipment 5.1 Sample divider. 5.2 Balance, with a reading accuracy of 0,001 g and capable of weighing to the nearest 0,01 g. 5.3 Sieves, with circular holes of 4,5 mm and 1,8 mm in diameter and slot-widths 1,0 mm × 20,0 mm, in accordance with the specifications of ISO 5223. 5.4 Sieving machine, having a rectilinear movement of go and come in the sense of the rectangular holes. 5.5 Magnifying glass, illuminated. 5.6 Forceps or horn spatula. 5.7 Pots, for retaining components. 5.8 Colour standard, as reference S 3030-Y30R in the Natural Colour System (NCS)1). 6 Sampling It is important that the laboratory receives 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 European Standard. For information, a recommended sampling procedure is given in EN ISO 24333 [1] for the sampling of cereals with constituents distributed uniformly or not uniformly. 7 Procedure Prepare by division a representative sample of at least (but near) 500 g for maize and 250 g for sorghum. Weigh it to the nearest 0,1 g (a). Pass the sample through the slotted sieve with an aperture of 1,0 mm (5.3), for half a minute. For constant sieving, a sieving machine (5.4) is recommended. If sieving is performed by hand, it shall consist of horizontal movements parallel to the length of the slots. The matter passed through the 1 mm sieve shall be regarded as extraneous matter. Stones, mud balls, straws, chaff, cob fragments and similar impurities from the over tail of the 1,0 mm slotted sieve have to be picked out. Both fractions are combined and are regarded as extraneous matter (3.5.3). Weigh them to the nearest 0,1 g (b). Impurities of animal origin should be counted (n), including those which passed through the sieve of 1,00 mm slot-width (5.3). If necessary, a magnifying glass should be used. The count of impurities of animal origin (3.5.4) should be quoted separately in numbers per kilogram of maize or sorghum, as appropriate. From the over tails of the 1,0 mm sieve (5.3), prepare, with the aid of a sample divider, a test sample, between 100 g and 200 g for maize and between 25 g and 50 g for sorghum. Weight this test sample to the nearest 0,01 g (c).
1) The Natural Colour System is defined by the Scandinavian Colour Institute AB, Stockholm (SE). For further explanation see www.ncscolour.com. SIST EN 16378:2013
EN 16378:2013 (E) 7 Subsequently spread out this partial sample in a thin layer on a table, and pick out by means of forceps or a horn spatula the element constituting the groups of impurities: other cereals (3.3.1), grains damaged by pests (3.3.2), sprouted grains (3.4), extraneous seeds (3.5.1), unsound grains (3.5.2) and remained extraneous matters (3.5.3). Grains whose tegument shows abnormal colour shall be cut longitudinally through the germ. If a major part or the totality of the section of the germ is identical or darker than the colour standard (5.8) then the two halves of the initial grain have to be accounted as grains overheated by drying (3.3.3). In the case of multiple kinds of damages are observed, the damaged grain shall be added to the fraction with the highest importance for the overall quality. Subsequently sieve the same partial sample through a sieve of 4,5 mm circular holes in diameter for maize or 1,8 mm circular holes in diameter for sorghum for half a minute. The through of this sieve belong to the group broken grains (3.2). Weigh the clean sample material (d) and all the groups of Besatz to the nearest 0,01 g. If, for a partial sample, the sum of weights for broken grains (3.2), other cereals (3.3.1), grains damaged by pests (3.3.2), grains overheated during drying (3.3.3), sprouted grains (3.4), extraneous seeds (3.5.1), unsound grains (3.5.2) and extraneous matters (3.5.3) and (d) differs by more than 1 % from (c), the determination shall be invalid and a new partial sample shall be analysed. 8 Expres
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