GB/T 5275.5-2014 in English

《GB/T 5275.5-2014气体分析 动态体积法制备校准用混合气体 第5部分：毛细管校准器》由TC206（全国气体标准化技术委员会）归口，TC206SC1（全国气体标准化技术委员会气体分析分会）执行，主管部门为中国石油和化学工业联合会。
GB/T5275的本部分规定了一种利用内含单个或多个毛细管组合(气体分割器)的设备,由纯气体或混合气连续制备校准混合气体的方法。
单毛细管系统可用于制备组分体积分数在10-8~0.5的混合气体。
本方法的相对扩展不确定度不超过2%,可用于制备指定气体氛围的工业气体混合系统。
气体分割器 用 于 从 纯 气 或 混 合 气 制 备 一 定 体 积 比 的 混 合 气 体。这 种 设 备 稀 释 获 得 体 积 分 数0.0005~0.9之间的基准气体,其相对重复性小于0.5%。
气体分割器制备混合气体的溯源性,可通过将其与国家或国际气体标准比较来实现。实例参见附录 A。

Scope

This part of GB/T 5275 specifies a method for continuously preparing a calibration mixed gas from a pure gas or a mixed gas using a device containing a single or multiple capillary tubes (gas splitter). The single capillary system can be used to prepare mixed gases with component volume fractions of 10^-8~0.5. The relative expanded uncertainty of this method is not more than 2%, and it can be used to prepare industrial gas mixing systems with specified gas atmospheres. The gas splitter is used to prepare a certain volume ratio of mixed gas from pure gas or mixed gas. This equipment is diluted to obtain reference gas with a volume fraction between 0.0005 and 0.9, and its relative repeatability is less than 0.5%. The traceability of the gas mixture prepared by the gas splitter can be achieved by comparing it with national or international gas standards. See Appendix A for examples.