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1、INTERNATIONAL STANDARD 1619 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION .MEYliYHAPOflHAR OPrAHbi3ALlHR IlO CTAHIIAPTH3ALWii4.ORGANISATION INTERNATIONALE DE NORMALlSATlON Cryolite, natural and artificial - Preparation and storage of test samples Cryolithe, naturelle et artificielle - Preparation e
2、t conservation des khantillons pour essai First edition - 1976-09-15 , z, I- + ,; e*, “9; 9-y , : F p .8=-z :,_ d i , . : 1- UDC 553.634 : 620.11 Ref. No. IS0 1619-1976 (E) Descriptors : aluminium ores, cryolite, samples, preparation, test specimens, storage, chemical analysis. Price based on 2 page
3、s Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 22:00:15 MDTNo reproduction or networking permitted without license from IHS -,-,- FOREWORD IS0 (the International Organization
4、for Standardization) is a worldwide federation of national standards institutes (IS0 Member Bodies). The work of developing international Standards is carried out through IS0 Technical Committees. Every Member Body interested in a subject for which a Technical Committee has been set up has the right
5、 to be represented on that Committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. Draft International Standards adopted by the Technical Committees are circulated to the Member Bodies for approval before their acceptance as Interna
6、tional Standards by the IS0 Council. Prior to 1972, the results of the work of the Technical Committees were published as IS0 Recommendations; these documents are now in the process of being transformed into International Standards. As part of this process, Technical Committee lSO/TC47 has reviewed
7、IS0 Recommendation R 1619 and found it technically suitable for transformation. International Standard IS0 1619 therefore replaces IS0 Recommendation R 1619-l 970. IS0 Recommendation R 1619 was approved by the Member Bodies of the following countries : Australia Austria Belgium Brazil Canada Czechos
8、lovakia Egypt, Arab Rep. of France Germany Greece Hungary India Iran Israel Italy Netherlands New Zealand Norway Poland Portugal Romania South Africa, Rep. of Spain Sweden Switzerland Turkey United Kingdom U.S.S.R. Yugoslavia No Member Body expressed disapproval of the Recommendation. No Member Body
9、 disapproved the transformation of ISO/R 1619 into an International Standard. o International Organization for Standardization, 1976 l Printed in Switzerland Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001
10、 Not for Resale, 04/25/2007 22:00:15 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD IS0 1619-1976 (E) Cryolite, natural and artificial - Preparation and storage of test samples 1 SCOPE AND FIELD OF APPLICATION This International Standard specifies th
11、e procedure for the preparation and storage of test samples, i.e. crude samples and dried samples, of natural and artificial cryolite, and of natural and synthetic materials having a molar ratio (NaF/AI Fa) between 3 and I,7 approximately. 2 REFERENCE IS0 . ., Cryolite, natural and artificial - Samp
12、ling. ) 3 PREPARATION OF TEST SAMPLES 3.1 Laboratory sample For the preparation of the laboratory sample, use the method specified in IS0 . . . 3.2 Crude sample, for the determination of certain geometric characteristics, for certain physical and physico- chemical tests and for moisture determinatio
13、n. Take approximately 300 g of the laboratory sample and place it in an airtight container of such a capacity that it is nearly filled by the sample. 3.3 Dried sample, for chemical tests, for the determination of certain geometric characteristics and for physical and physico-chemical tests. 3.3.1 Pr
14、inciple Grinding followed by sieving of the sample until the whole passes through a sieve of mesh aperture 0,125 mm. Thorough mixing and drying at approximately 110 “C. 3.3.2 Apparatus Ordinary laboratory apparatus and 3.3.2.1 Sieve, of mesh aperture 0,125 mm, made of a material that cannot cause in
15、troduction of the impurity to be determined. The sieve shall be selected in relation to the impurity to be determined. 3.3.2 2 Mortar, of corundum or agate. 3.3.2.3 Electric oven, capable of being controlled at 110?2c. 3.3.3 Procedure Sieve approximately 100 g of the laboratory sample using the siev
16、e (3.3.2.1). Grind the particles remaining in the sieve in the mortar (3.3.2.2) and sieve again. Add these sievings to the material which has previously passed through the sieve and mix carefully. Repeat the grinding, sieving and mixing operations until all the material is passed through the sieve.
17、Place the sample thus prepared in a platinum dish and dry for at least 2 h in the oven (3.3.2.3) controlled at 110 + 2 C. Remove the dish from the oven and allow to cool in a desiccator. Keep the dried sample in an airtight container, the capacity of which is such that the sample fills it almost com
18、pletely. 4 MARKING OF CONTAINERS The containers shall bear a label indicating : a) the name of the product; b) the origin of the product; c) the nature of the sample (crude or dried); d) the type of sieve used; e) the date of preparation. 1) In preparation. 1 Copyright International Organization for
19、 Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 22:00:15 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 1619-1976 (E) ANNEX IS0 PUBLICATIONS RELATING TO CYROLITE, NATURAL AND ARTIFICIAL I
20、S0 1619 - Preparation and storage of test samples. IS0 1620 - Determination of silica content - Reduced molybdosilicate spectrophotometric method. IS0 1693 - Determination of fluorine content - Modified Willard-Winter method. IS0 1694 - Determination of iron content - l,lO-Phenanthroline photometric
21、 method. IS0 2366 - Determination of sodium content - Flame emission and atomic absorption spectrophotometric methods. IS0 2367 - Determination of aluminium content - 8-Hydroxyquinoline gravimetric method. IS0 2830 - Determination of aluminium content - Atomic absorption method. IS0 3391 - Determina
22、tion of calcium content - Flame atomic absorption method. IS0 3392 - Determination of water content - Electrometric method. IS0 3393 - Determination of moisture content - Gravimetric method. IS0 4277 - Evaluation of free fluorides content - Conventional titrimetric method. IS0 4280 - Determination o
23、f sulphates content - Barium sulphate gravimetric method. IS0 . . . - Sampling. 2 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 22:00:15 MDTNo reproduction or networking permitted without license from IHS -,-,-