EN ISO 2171-2010 en Cereals pulses and by-products - Determination of ash yield by incineration《谷类食品 豆类及其副产品 焚化后灰分的测定》.pdf
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1、BRITISH STANDARDBS EN ISO 2171:2010Cereals, pulses and by-products Determination of ash yield by incinerationICS 67.060g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g
2、42g43g55g3g47g36g58National forewordThis British Standard is the UK implementation of EN ISO 2171:2010. It is identical to ISO 2171:2007. It supersedes BS ISO 2171:2007 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee AW/4, Cereals and pulses.A list of
3、organizations represented on this committee can be obtained on request 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 obli
4、gations.BS EN ISO 2171:2010This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 November 2007 BSI 2010Amendments/corrigenda issued since publicationDate Comments 30 June 2010 This corrigendum renumbers BS ISO 2171:2007 as BS EN ISO 2171:2010ISB
5、N 978 0 580 69803 3EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE 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) Crales, lgumineuses et produits drivs - Dosage du taux de cendres par incinration (ISO 2
6、171:2007) Getreide, Hlsenfrchte 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 Euro
7、pean 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 (Engli
8、sh, 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,
9、 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 STAN
10、DARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR 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: EForeword The text of ISO 2171:2007
11、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
12、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
13、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 Standa
14、rd: 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 K
15、ingdom. Endorsement notice The text of ISO 2171:2007 has been approved by CEN as a EN ISO 2171:2010 without any modification. BS EN ISO 2171:2010EN ISO 2171:2010 (E)iiiContents Page 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 1 4 Principle. 2 5 Reagents 2 6 Apparatus 2 7 Sampling
16、 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 Interlaborat
17、ory 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 BS EN ISO
18、 2171:2010EN ISO 2171:2010 (E)This page deliberately set blank1Cereals, 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
19、. 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 n
20、ot 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
21、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)
22、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
23、 published. BS EN ISO 2171:2010EN ISO 2171:2010 (E)2 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, produc
24、ts 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 1
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