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1、INTERNATIONAL STANDARD INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION MEXAYHAPOAHAR OPrAHkl3AWl n0 CTAHAAPTM3AklM Carbonaceous materials for the production of aluminium - Pitch for electrodes - Determination of sulfur content by the bomb method Produits c
2、arbon ml is the mass, in grams, of barium sulfate obtained from the test portion; m2 is the mass, in grams, of barium sulfate obtained during the blank test; 0,137 3 is the conversion factor from BaS04 to S. 8.2 Precision The permissible difference between two results shall not exceed the appropriat
3、e value given in table 4. Table 4 Values in percentage by mass 1 Sulfur content 1 Repeatability 1 Reproducibility 1 0,l to 0,5 0,04 0.05 0.5to 1.0 0.05 0,09 l,o to 1,5 0,08 0.15 I,5 to2.0 0,12 0,25 2,0 to 5,0 0,18 0,27 The test report shall include the following particulars: a) an identification of
4、the sample; b) a reference to this International Standard; c) the results and the units in which they are expressed; d) any unusual features noted during the determination; Annex A (informative) Bibliography e) any operations not included in this International Stan- dard or regarded as optional. II
5、ASTM D 129-64, Standard test method for sulfur in petroleum products (General bomb method). 21 BS 2000 : Part 61 : 1992, Petroleum and its products - Part 61 : Sulphur in petroleum products (bomb method). 31 BS 4791 : 1985, Specification for calorimeter bombs. -,-,- Is0 9655 : 1966 (El UDC 665.777 : 542.5 : 546.22 Descriptors : industrial products, electrodes, pitch (materials), chemical analysis, determination of content, sulphur, aluminium, production. Price based on 4 pages -,-,-