ISO INTERNATIONAL STANDARD 1833-7 Second edition 2017-08 Textiles - Quantitative chemical analysis - Part 7: Mixtures of polyamide with certain other fibres (method using formic acid) Textiles - Analyse chimique quantitative Partie 7: Melanges de polyamide avec certaines autres fibres (méthode a I'acide formique) Reference number ISO 1833-7:2017(E) [so @ IS0 2017 IS0 1833-7:2017(E) Contents Page Foreword ..iv 1 Scope .1 2 Normative references. 3 Terms and definitions. 4 Principle 5 Reagents. 6 Apparatus. ..2 7 Test procedure. ..2 8 Calculation and expression of results ..2 9 Precision ..2 Bibliography ..3 @ IS0 2017 - All rights reserved iii IS0 1833-7:2017(E) 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. The procedures used to develop this document and those intended for its further maintenance are described in the Iso/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of IsO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). 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. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the Iso list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constituteanendorsement. For an explanation on the voluntary nature of standards, the meaning of IsO specific terms and expressions related to conformity assessment, as well as information about Iso's adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html This document was prepared by Technical Committee ISO/TC 38, Textiles. This second edition cancels and replaces the first edition (IS0 1833-7:2006), which has been technically revised. The main changes compared to the previous edition are as follows: the title was changed from “Mixtures of polymide and certain other fibres.." to “Mixtures of polymide with certain other fibres..."; in Clause 1, some remaining fibres were added; - in Clause 8, a specific d-factor for melamine was added; in Clause 9, “percentage point" to avoid confusion was added. A list of all parts in the ISO 1833 series can be found on the ISO website. iv @ IS0 2017 - All rights reserved