SIST EN ISO 2171:2010

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Getreide - Hülsenfrüchte und Nebenprodukte - Bestimmung des Aschegehalts durch Verbrennung (ISO 2171:2007)Céréales, légumineuses et produits dérivés - Dosage du taux de cendres par incinération (ISO 2171:2007)Cereals, pulses and by-products - Determination of ash yield by incineration (ISO 2171:2007)67.060QMLKCereals, pulses and derived productsICS:Ta slovenski standard je istoveten z:EN ISO 2171:2010SIST EN ISO 2171:2010en,fr,de01-september-2010SIST EN ISO 2171:2010SLOVENSKI
STANDARD



SIST EN ISO 2171:2010



EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN ISO 2171
April 2010 ICS 67.060 English Version
Cereals, pulses and by-products -Determination of ash yield by incineration (ISO 2171:2007)
Céréales, légumineuses et produits dérivés - Dosage du taux de cendres par incinération (ISO 2171:2007)
Getreide, Hülsenfrüchte und Nebenprodukte -Bestimmung des Aschegehalts durch Verbrennung (ISO 2171:2007) This European Standard was approved by CEN on 13 March 2010.
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 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 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 2171:2010: ESIST EN ISO 2171:2010



EN ISO 2171:2010 (E) 2 Contents Page Foreword .3 SIST EN ISO 2171:2010



EN ISO 2171:2010 (E) 3 Foreword The text of ISO 2171:2007 has been prepared by Technical Committee ISO/TC 34 “Food products” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 2171:2010 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 October 2010, and conflicting national standards shall be withdrawn at the latest by October 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 national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, 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 the United Kingdom. Endorsement notice The text of ISO 2171:2007 has been approved by CEN as a EN ISO 2171:2010 without any modification.
SIST EN ISO 2171:2010



SIST EN ISO 2171:2010



Reference numberISO 2171:2007(E)© ISO 2007
INTERNATIONAL STANDARD ISO2171Fourth edition2007-11-01Cereals, pulses and by-products — Determination of ash yield by incinerationCéréales, légumineuses et produits dérivés — Dosage du taux de cendres par incinération
SIST EN ISO 2171:2010



ISO 2171:2007(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.
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SIST EN ISO 2171:2010



ISO 2171:2007(E) © ISO 2007 – All rights reserved iiiContents Page Foreword.iv 1 Scope.1 2 Normative references.1 3 Terms and definitions.1 4 Principle.2 5 Reagents.2 6 Apparatus.2 7 Sampling.3 8 Preparation of the test sample.3 9 Procedure.3 9.1 Determination of the moisture content.3 9.2 Preparation of the ashing dishes.3 9.3 Preparation of the test portion.4 9.4 Pre-ashing.4 9.5 Ashing.4 9.6 Number of determinations.4 10 Expression of results.4 11 Precision.5 11.1 Interlaboratory tests.5 11.2 Repeatability.5 11.3 Reproducibility.5 11.4 Critical difference.6 11.5 Uncertainty.6 12 Test report.6 Annex A (informative)
Results of interlaboratory tests.8 Annex B (informative)
Practical application of repeatability and reproducibility limits.10 Bibliography.11
SIST EN ISO 2171:2010



ISO 2171:2007(E) iv © ISO 2007 – All rights reserved Foreword ISO (the International Organization 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 has 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. International Standards 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 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 document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 2171 was prepared by Technical Committee ISO/TC 34, Food products, Subcommittee SC 4, Cereals and pulses. This fourth edition cancels and replaces the third edition (ISO 2171:1993), which has been technically revised.
SIST EN ISO 2171:2010



INTERNATIONAL STANDARD ISO 2171:2007(E) © ISO 2007 – All rights reserved 1Cereals, pulses and by-products — Determination of ash yield by incineration 1 Scope This International Standard specifies a method for determining the ash yielded by cereals, pulses and their milled products intended for human consumption. The source materials covered are: a) grains of cereals; b) flours and semolinas; c) milled products (bran and high bran content products, sharps); d) mixed cereal flours (mixes); e) cereal by-products other than milled products; and f) pulses and their by-products. This International Standard is not applicable to starches and starch derivatives (see ISO 3593), to products intended for animal feeding stuffs (see ISO 5984), or to seeds. 2 Normative references The following referenced documents are indispensable for 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. ISO 712, Cereals and cereal products — Determination of moisture content — Routine reference method ISO 6540, Maize — Determination of moisture content (on milled grains and on whole grains) ISO 24557:—1), Pulses — Determination of moisture content — Air-oven method 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 ash incombustible residue obtained after incineration according to the method given in this International Standard
1) To be published. SIST EN ISO 2171:2010



ISO 2171:2007(E) 2 © ISO 2007 – All rights reserved 4 Principle A test portion is incinerated until combustion of organic matter is complete, then the residue obtained is weighed. The residue obtained is flaky after incineration at 550 °C and vitrified after incineration at 900 °C. In general, products containing salts (e.g. sodium chloride, pyrophosphate) shall be incinerated at (550 ± 10) °C. Table 1 summarizes incineration temperatures according to product type. Table 1 — Incineration temperatures and product type Product type Incineration temperature Flours (550 ± 10) °C (900 ± 25) °C Semolinas (550 ± 10) °C (900 ± 25) °C Cereal grains (550 ± 10) °C (900 ± 25) °C Other milled products (e.g. bran, high bran content products, sharps) (550 ± 10) °C — Mixed cereal products (mixes) (550 ± 10) °C — Cereal by-products other than milled products (55
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