BS ISO 1170:2020 pdf download – Coal and coke — Calculation of analyses to different bases No terms and definitions are listed in this document. ISO and IEC maintain terminological databases for use in standardization at the following addresses: — ISO Online browsing platform: available at https:// www .iso .org/ obp — IEC Electropedia: available at http:// www .electropedia .org/ 3.2 Symbols The symbols used in the subsequent clauses are as follows, with suffixes (separated by a comma) “ad” (air-dried), “ar” (as-received), “d” (dry), “daf” (dry, ash-free) or “dmmf” (dry, mineral-matter-free) where appropriate. w A ash, expressed as percent mass fraction w C carbon mass fraction, expressed as percent w Cl chlorine mass fraction, expressed as percent w Cl,inorg inorganic chlorine mass fraction, expressed as percent w CO 2 carbon dioxide mass fraction, expressed as percent w H hydrogen mass fraction, excluding hydrogen in the moisture, but including the hydrogen from water of hydration in minerals, expressed as percent w H 2 O moisture mass fraction, expressed as percent w h water of hydration in the mineral matter mass fraction, expressed as percent w MM mineral matter mass fraction, expressed as percent (see Annex A) w N nitrogen mass fraction, expressed as percent w O oxygen mass fraction, excluding oxygen in the moisture but including the oxygen from water of hydration in minerals, expressed as percent w S,o organic sulfur mass fraction, expressed as percent w S,p pyritic sulfur mass fraction, expressed as percent w S,s sulfate sulfur mass fraction, expressed as percent w S,T total sulfur mass fraction, expressed as percent w V volatile matter mass fraction, expressed as percent F Cl national correction factor for the estimation of the inorganic chlorine mass fraction F h national correction factor for the estimation of water of hydration F MM national correction factor for the estimation of the mineral matter (see Annex A) 4 Principle In order to convert an analytical result expressed on one basis to another basis, it is multiplied by a factor calculated from the appropriate formulae (see Table 1) after insertion of the requisite numerical values. 5 Calculations for coal analyses 5.1 General In International Standards covering the analysis of coal, it is generally specified that the determination shall be carried out on an air-dried test sample. However, in making use of these analyses, it is sometimes necessary to express or report the results on some other...

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