气体分析.用动态容量法对校准气体混合物的制备.第5部分:毛细管校准装置

[中文适用范围]： 本部分ISO 6145是处理用于制备校准气体混合物的各种动态体积技术的一系列国际标准之一。本部分规定了使用毛细管校准装置（单个或多个组合，即气体分流器）从纯气体或气体混合物连续制备校准气体混合物的方法。单毛细管系统可用于提供微量组分体积分数在10^-8至0.5范围内的气体混合物。该技术的相对扩展不确定度小于±2%（k=2）。该应用用于工业气体混合面板，以生产特定的气体气氛。气体分流器可用于将由气体或气体混合物制备的气体混合物按受控的体积比例进行分割。这些设备能够进行体积分数从0.0005到0.9的稀释，相对重复性优于0.5%。气体分流器产生的气体混合物的溯源性通过与相关国家或国际气体标准的气体混合物进行比较来实现。示例见附录A。 [外文原描述]： ISO 6145-5:2009 is one of a series of International Standards dealing with the various dynamic volumetric techniques used for the preparation of calibration gas mixtures. This part specifies a method for the continuous production of calibration gas mixtures from pure gases or gas mixtures using capillary calibration devices in single or multiple combinations (gas dividers). Single capillary systems can be used to provide gas mixtures where the minor component is in the range of volume fractions from 10 - 8 to 0,5. The relative expanded uncertainty of this technique is less than ±2 % ( k = 2) relative. This application is used in industrial gas mixing panels for the production of specific gas atmospheres. Gas dividers can be used to divide gas mixtures prepared from gases or gas mixtures into controlled proportions by volume. These devices are capable of dilutions in the range of volume fractions from 0,000 5 to 0,9 of the primary gas concentration with a relative repeatability of better than 0,5 %. Traceability of the gas mixtures produced by a gas divider is achieved by comparison of a mixture with gas mixtures related to national or international gas standards. An example is given in Annex A.