INTERNATIONALISO 国际ISO STANDARD7970 标准7970 Fourth edition 第四版 2021-01 Wheat(TriticumaestivumL)-Specification 小麦(TriticumaestivumL.)一规范 Blé tendre (Triticum aestivumL.) - Spécifications Reference number ISO 7970:2021(E) (C)IS02021 软质小麦(TriticumaestivumL.）-规格参考编号IS07970:2021(E)(C)IS02021 COPYRIGHTPROTECTEDDOCUMENT 版权保护文件 (C) ISO 2021 (C) ISO 2021 All rights reserved.Unless otherwise specified, or required in the contextof its implementation,nopartofthispublicationmaybereproducedorutilizedotherwise in any form or by any means, electronic or mechanical, including photocopying, or posting ontheinternet or an intranet, withoutpriorwrittenpermission.Permission can berequested fromeitherIsO at theaddress belowor IsO'smember body inthe countryoftherequester. 版权所有。除非另有规定，或在其实施背景下有此要求，否则未经事先书面许可， 本出版物任何部分不得以任何形式或任何手段，电子或机械，包括影印或在网上或 内部网上发布。许可可以向以下ISO地址或请求者所在国家的ISO成员机构申请。 ISO copyright office ISO版权办公室 CP401·Ch.deBlandonnet8 CP401·Ch.deBlandonnet8 CH-1214Vernier,Geneva CH-1214Vernier，日内瓦 Phone: +41 22 749 01 11 电话：+41227490111 Email: copyright@iso.org 电子邮件：copyright@iso.org Website: www.iso.org 网站：www.iso.org Published in Switzerland (C) IS0 2021 - All rights reserved Contents Page 在瑞士出版(C)ISO2021-版权所有，保留所有权利目录页码 Foreword iv 前言iv 1 Scope.1 1范围.1 2Normativereferences1 2规范性引用1 3Termsanddefinitions1 3术语和定义1 4Requirements3 4要求3 4.1Generalcharacteristicsandsensoryproperties3 4.1一般特性和感官属性3 4.2Health characteristics.4 4.2健康特性.4 4.3Physicaland chemical characteristics4 4.3物理和化学特性4 4.3.1Moisture content.4 4.3.1含水量.4 4.3.2 Bulk density .4 4.3.2堆积密度.4 4.3.3Impurities4 4.3.3杂质4 4.3.4 α-Amylase activity.4 4.3.4α-淀粉酶活性.4 5 Sampling. 5 5采样.5 6 Test methods. 5 6试验方法.5 AnnexA(informative)Indicativelistofharmfulandtoxicseeds6 附件A(资料性)有害和有毒种子的指示性列表6 AnnexB(informative)Unacceptablemitesandinsectpestsofstoredcereals.7 附件B(资料性)储存谷物中不可接受的螨虫和昆虫害虫.7 Annex C (normative)Determinationof impurities.9 附件C(规范性)杂质的测定.9 AnnexD(informative)Practicalapplicationoffidelitydatafordifferentclassesof impurities18 附件D(资料性)不同类别杂质忠实度数据的实际应用18 Bibliography 22 参考文献22