DIN EN ISO 6145-11-2008 气体分析.动态容量法制备校准气体混合物.第11部分:电化学生成法

标准号：DIN EN ISO 6145-11-2008
中文标准名称：气体分析.动态容量法制备校准气体混合物.第11部分:电化学生成法
英文标准名称：Gas analysis - Preparation of calibration gas mixtures using dynamic volumetric methods - Part 11: Electrochemical generation (ISO 6145-11:2005); English version of DIN EN ISO 6145-11:2008-11
标准类型：G86
发布日期：2008/11/1 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：G86
国际标准分类号：71.040.40
引用标准：ISO 6143;ISO 6145-1;ISO 6145-7-2001
适用范围：This part of ISO6145 specifies a method for the preparation of calibration gas mixtures by usingelectrochemical generation of a calibration component and introduction into a complementary gas flow. Byalteration of the gas flow or the charge passed through the cell electrolyte, it is possible to change thecomposition of the gas mixture. The relative expanded uncertainty of the calibration gas content, U, obtainedby multiplying the relative combined standard uncertainties by a coverage factor, k = 2, is not greater than 5 %.The method described in this part of ISO 6145 is intended to be applied to the preparation of calibration gasmixtures in the volume fraction ranges (0,1 to 250) x 10-6.NOTE 1 Gases that can be produced by electrochemical generation are oxygen (O2), hydrogen (H2), hydrogencyanide(HCN), hydrogen sulfide(H2S), chlorine(CI2), bromine(Br2), chlodne dioxide(CIO2), ammonia(NH3), nitricoxide (NO), nitrogen (N2), carbon dioxide (CO2), phosphine (PH3), arsine (ASH3) and ozone (03),NOTE 2 The mehts of the method are that a stable calibration gas mixture can be quickly prepared within minutes.NOTE 3 Gas blending systems based on electroche mica[ generation and thermal mass flow controllers, with the facilityof computerization and automatic control, are commercially available. An example is given in Annex A