石油产品 残碳的测定 数量法

[中文适用范围]： 本国际标准规定了石油产品在规定条件下蒸发和热解后剩余的碳残留量的测定方法，范围为0.10%（m/m）至30.0%（m/m） 。 注1：残碳值是石油产品在类似降解条件下形成碳质沉积物倾向的近似值，可用于评估同类产品的相对碳形成倾向。 在这种情况下，在解释结果时应小心。 对于残留物超过 0.10 % (m/m) 的产品，测试结果相当于通过 Conradson 碳残留物测试（参见 ISO 6615[1]）在 0.10 (m/m) 范围内获得的结果。 /m) 至 25,0 (m/m)（详情参见附录 A）。 本国际标准也适用于主要由馏分物质组成且可能产生低于 0.10% (m/m) 的残碳的石油产品。 对于此类材料，在分析前按照 7.3.1 和 7.3.2 中所述的程序制备 10% (V/V) 蒸馏残渣。 ISO 6245[2] 定义的灰分形成成分和样品中存在的非挥发性添加剂都会增加残炭值，并包含在报告的总值中。 注 2：某些馏分燃料中含有的有机硝酸盐会产生异常高的碳残留值。 ISO 13759 可以检测燃料中是否存在硝酸烷基酯。 [3] [外文原描述]： ISO 10370:2014 specifies a method for the determination of the amount of carbon residue, in the range 0,10 % (m/m) to 30,0 % (m/m), left after evaporation and pyrolysis of petroleum products under specified conditions. NOTE 1 The carbon residue value serves as an approximation of the tendency of petroleum products to form carbonaceous deposits under similar degradation conditions, and may be useful in the assessment of relative carbon-forming tendencies of products within the same class. In this case, care should be taken in the interpretation of results. For products which yield a residue in excess of 0,10 % (m/m), the test results are equivalent to those obtained by the Conradson carbon residue test (see ISO 6615[1]) in the range of 0,10 (m/m) to 25,0 (m/m) (for details see Annex A). This International Standard is also applicable to petroleum products which consist essentially of distillate material, and which may yield a carbon residue below 0,10 % (m/m). On such materials, a 10 % (V/V) distillation residue is prepared by the procedure described in 7.3.1 and 7.3.2 before analysis. Both ash-forming constituents, as defined by ISO 6245[2] and non-volatile additives present in the sample add to the carbon residue value and are included in the total value reported. NOTE 2 The presence of organic nitrates incorporated in certain distillate fuels will yield abnormally high values for the carbon residue. The presence of alkyl nitrate in the fuel may be detected by ISO 13759.[3]