Standard No.:	GB/T 5275-2005
English Name:	Gas analysis-Preparation of calibration gas mixtures-Permeation method
Chinese Name:	气体分析校准用混合气体的制备渗透法
Chinese Classification:	N50    Material composition analysis instrument and environment detection instrument in general
Professional Classification:	GB    National Standard
ICS Classification:	71.040.40 71.040.40    Chemical analysis 71.040.40
Issued by:	AQSIQ; SAC
Issued on:	2005-05-18
Implemented on:	2005-12-1
Status:	superseded
Superseded by:	GB/T 5275.10-2009 Gas analysis—Preparation of calibration gas mixtures using dynamic volumetric methods—Part 10:Permeation method
Superseded on:	2010-2-1
Abolished on:	2010-02-01
Superseding:	GB/T 5275-1985 GB 5275-1985 Gas analysis; Preparation of calibration gas mixtures; Permeation methods
Language:	English
File Format:	PDF
Word Count:	4000 words
Price(USD):	120.00
Delivery:	via email in 1~3 business day

本标准规定了用渗透原理制备校准用混合气体的方法。它是一种动态配气方法。通常所需组分在混合气体中的浓度范围为10-9～10-5(体积分数)，组分浓度的准确度可以达到2%(实际上，浓度单位也可以用μg/m3表示)。由于在这样低的浓度范围内要保持混合气体的浓度稳定不变是困难，因此校准用混合气应在临用时制备，并且输送混合气体的管路应尽可能短。