1、 Reference numberISO 1833-7:2006(E)ISO 2006INTERNATIONAL STANDARD ISO1833-7First edition2006-06-01Textiles Quantitative chemical analysis Part 7: Mixtures of polyamide and certain other fibres (method using formic acid) Textiles Analyse chimique quantitative Partie 7: Mlanges de polyamide et de cert
2、aines autres fibres (mthode lacide formique) ISO 1833-7:2006(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes 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
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5、nform the Central Secretariat at the address given below. ISO 2006 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing fro
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7、) ISO 2006 All rights reserved iiiForeword 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 int
8、erested 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 Electrotechnic
9、al 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
10、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.
11、ISO shall not be held responsible for identifying any or all such patent rights. ISO 1833-7 was prepared by Technical Committee ISO/TC 38, Textiles. This first edition of ISO 1833-7 cancels and replaces Clause 6 of ISO 1833:1977. ISO 1833:1977 will be cancelled and replaced by ISO 1833-1, ISO 1833-3
12、, ISO 1833-4, ISO 1833-5, ISO 1833-6, ISO 1833-7, ISO 1833-8, ISO 1833-9, ISO 1833-10, ISO 1833-11, ISO 1833-12, ISO 1833-13, ISO 1833-14, ISO 1833-15, ISO 1833-16, ISO 1833-17, ISO 1833-18 and ISO 1833-19. ISO 1833 consists of the following parts, under the general title Textiles Quantitative chemi
13、cal analysis: Part 1: General principles of testing Part 2: Ternary fibre mixtures Part 3: Mixtures of acetate and certain other fibres (method using acetone) Part 4: Mixtures of certain protein and certain other fibres (method using hypochlorite) Part 5: Mixtures of viscose, cupro or modal and cott
14、on fibres (method using sodium zincate) Part 7: Mixtures of polyamide and certain other fibres (method using formic acid) Part 8: Mixtures of acetate and triacetate fibres (method using acetone) Part 9: Mixtures of acetate and triacetate fibres (method using benzyl alcohol) Part 10: Mixtures of tria
15、cetate or polylactide and certain other fibres (method using dichloromethane) Part 11: Mixtures of cellulose and polyester fibres (method using sulfuric acid) Part 12: Mixtures of acrylic, certain modacrylics, certain chlorofibres, certain elastanes and certain other fibres (method using dimethylfor
16、mamide) Part 13: Mixtures of certain chlorofibres and certain other fibres (method using carbon disulfide/acetone) ISO 1833-7:2006(E) iv ISO 2006 All rights reserved Part 14: Mixtures of acetate and certain chlorofibres (method using acetic acid) Part 15: Mixtures of jute and certain animal fibres (
17、method by determining nitrogen content) Part 16: Mixtures of polypropylene fibres and certain other fibres (method using xylene) Part 17: Mixtures of chlorofibres (homopolymers of vinyl chloride) and certain other fibres (method using sulfuric acid) Part 18: Mixtures of silk and wool or hair (method
18、 using sulfuric acid) Part 19: Mixtures of cellulose fibres and asbestos (method by heating) Part 21: Mixtures of chlorofibres, certain modacrylics, certain elastanes, acetates, triacetates and certain other fibres (method using cyclohexanone) The following parts are under preparation: Part 6: Mixtu
19、res of viscose or certain types of cupro or modal or lyocell and cotton fibres (method using formic acid and zinc chloride) Part 20: Mixtures of elastane and certain other fibres (method using dimethylacetamide) Part 22: Mixtures of viscose or certain types of cupro or modal or lyocell and flax fibr
20、es (method using formic acid and zinc chlorate) Part 23: Mixtures of polyethylene and polypropylene (method using cyclohexanone) Part 24: Mixtures of polyester and some other fibres (method using phenol and tetrachloroethane) INTERNATIONAL STANDARD ISO 1833-7:2006(E) ISO 2006 All rights reserved 1Te
21、xtiles Quantitative chemical analysis Part 7: Mixtures of polyamide and certain other fibres (method using formic acid) 1 Scope This part of ISO 1833 specifies a method, using formic acid, to determine the percentage of polyamide fibre, after removal of non-fibrous matter, in textiles made of binary
22、 mixtures of polyamide and cotton, viscose, cupro, modal, polyester, polypropylene, chlorofibre, acrylic or glass fibre. It is also applicable to mixtures with wool and animal hair, but when the wool content exceeds 25 %, the method described in ISO 1833-4 should be used. 2 Normative references The
23、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 1833-1, Textiles Quantitative chemical analysis P
24、art 1: General principles of testing 3 Principle The polyamide is dissolved out from a known dry mass of the mixture, with aqueous formic acid. The residue is collected, washed, dried, and weighed; its mass, corrected if necessary, is expressed as a percentage of the dry mass of the mixture. The per
25、centage of polyamide fibre is found by the difference. 4 Reagents Use the reagents described in ISO 1833-1 together with those given in 4.1 and 4.2. 4.1 Formic acid, 80 % (mass fraction) ( 1,19 g/ml). Dilute 880 ml of 90 % (mass fraction) formic acid ( 1,20 g/ml) to 1 I with water. Alternatively, di
26、lute 780 ml of 98 % to 100 % (mass fraction) formic acid ( 1,22 g/ml) to 1 I with water. The concentration is not critical within the range 77 % to 83 % (mass fraction) formic acid. NOTE Formic acid at 80 % (mass fraction) has a density = 1,186 g/ml. ISO 1833-7:2006(E) 2 ISO 2006 All rights reserved
27、4.2 Ammonia, dilute solution. Dilute 80 ml of concentrated ammonia solution ( 0,88 g/ml) to 1 I with water. 5 Apparatus Use the apparatus described in ISO 1833-1 together with that given in 5.1. 5.1 Conical flask, minimum capacity 200 ml, glass-stoppered. 6 Test procedure Follow the general procedur
28、e given in ISO 1833-1, and then proceed as follows. To the specimen contained in the conical flask, add 100 ml of formic acid per gram of specimen. Insert the stopper, shake the flask to wet out the specimen, and allow the flask to stand for 15 min, shaking it at intervals. Filter the contents of th
29、e flask through a weighed filter crucible and transfer any residual fibres to the crucible by washing out the flask with a little more formic acid. Drain the crucible using suction and wash the residue on the filter successively with formic acid, hot water, dilute ammonia solution, and finally cold
30、water, draining the crucible using suction after each addition. Do not apply suction until each washing liquor has drained under gravity. Finally, drain the crucible using suction, dry the crucible and residue, then cool and weigh them. 7 Calculation and expression of results Calculate the results a
31、s described in the general instructions of ISO 1833-1. The value of d is 1,00. 8 Precision On a homogeneous mixture of textile materials the confidence limits of the results obtained by this method are not greater than 1 for the confidence level of 95 %. ISO 1833-7:2006(E) ISO 2006 All rights reserved 3Bibliography 1 ISO 1833-4, Textiles Quantitative chemical analysis Part 4: Mixtures of certain protein and certain other fibres (method using hypochlorite) ISO 1833-7:2006(E) ICS 59.060.01 Price based on 3 pages ISO 2006 All rights reserved
