ISO 14912:2003 气体分析-气体混合物成分数据转化

标准编号：ISO 14912:2003

中文名称：气体分析-气体混合物成分数据转化

英文名称：Gas analysis — Conversion of gas mixture composition data

发布日期：2003-03

标准范围

ISO 14912:2003定义了以下常用于表示气体混合物成分的量:摩尔分数、质量分数和体积分数，以及摩尔浓度、质量浓度和体积浓度。关于这些成分的量，ISO 14912:2003提供了不同量之间以及不同状态条件之间的转换方法。不同量之间的转换是指根据上述一个量计算分析物含量的数值，该数值来自相同分析物含量的数值，在气体混合物的相同压力和温度下，根据这些量中的另一个给出。不同状态条件之间的转换意味着根据气体混合物在一组状态条件下（即压力和温度）相同数量的数值，在一组状态条件下，根据上述数量之一计算分析物含量的数值。通过两种转化方式的组合，可以在不同成分量和不同状态条件下同时转化混合气体成分。ISO 14912:2003仅适用于均质和稳定的气体混合物。因此，所考虑的任何状态条件（压力和温度）都需要远离气体混合物的冷凝区和每个指定分析物的冷凝区。

ISO 14912:2003 defines the following quantities commonly used to express the composition of gas mixtures: mole fraction, mass fraction and volume fraction, as well as mole concentration, mass concentration and volume concentration.Relating to these quantities of composition, ISO 14912:2003 provides methods for the conversion between different quantities and the conversion between different state conditions. Conversion between different quantities means calculating the numerical value of an analyte content in terms of one of the quantities listed above from the numerical value of the same analyte content, at the same pressure and temperature of the gas mixture, given in terms of another of these quantities. Conversion between different state conditions means calculating the numerical value of an analyte content, in terms of one of the quantities listed above, under one set of state conditions from the numerical value of the same quantity under another set of state conditions, i.e. pressure and temperature, of the gas mixture. Gas mixture composition can be converted simultaneously between different quantities of composition and different state conditions by combination of the two types of conversion.ISO 14912:2003 is only applicable to homogeneous and stable gas mixtures. Therefore any state conditions (pressure and temperature) considered need to be well outside from the condensation region of the gas mixture and that of each of the specified analytes.

标准预览图