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1、INTERNATIONAL STANDARD IS0 5437 Second edition 1992-l 2-I 5 Acid-grade and ceramic-grade fluorspar - Determination of barium sulfate content - Gravimetric method Spaths fluor pour la fabrkation de Iacide fluorhydrique et spaths fiuor utilisables dans Iindustrie c ml is the mass, in grams, of the cru
2、cible; m, is the mass, in grams, of the crucible and residue. I) Whatman No. 42 is an example of a suitable filter paper available commercially. This information is given for the con- venience of users of this International Standard and does not constitute an endorsement by IS0 of this filter paper.
3、 2 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 21:14:52 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 5437:1992(E) 9 Test report c) the result
4、s and the form in which they have been expressed; The test report shall include the following particulars: a) all information necessary for the identification of the sample; b) a reference to the method used (reference to this International Standard); d) any unusual features noted during the determi
5、- nation; e) any operation not included in this International Standard, or in the International Standards to which reference is made, or regarded as optional. 3 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545
6、001 Not for Resale, 04/27/2007 21:14:52 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 5437:1992(E) UDC 553.634.12:543.21:546.431226 Descriptors: minerals and ores, fluorspar, chemical analysis, determination of content, barium sulphate, gravimetric analysis Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 21:14:52 MDTNo reproduction or networking permitted without license from IHS -,-,-