环境空气质量.悬浮颗粒物质的PM2.5质量部分的测定用标准重量分析测量方法

标准编号：DIN EN 14907-2005

发布单位：DIN

发布日期：2005年

实施日期：10000000

主      题：质量浓度 重量分析的 重量分析法 悬浮尘埃 称重 环境空气 测量仪器 抽样方法 空气污染 空气净化 标准参考测量方法 维修 空气质量 测量不确定度 颗粒 质量控制 颗粒物质的测定 质量保证 定义 尘埃 测定 测量 

中国标准分类号：Z15

国际标准分类号：13_040_20

摘      要：This European Standard describes a standard method for determining the PM215 mass concentration of suspended particulate matter in ambient air by sampling the particulate matter on filters and weighing them by means of a balance. Measurements are made over a sampling period of about 24 h, and in line with the Directive. are expressed as pg/m3, where the volume of air is the volume at ambient conditions near the inlet at the time of sampling. The range of application of the standard is from 1 pg/m3 (i.e. the limit of detection of the standard measurement method expressed as its uncertainty) up to 120 pg/m3 (i.e. the maximum concentration levelobserved during the field study undertaken by CEN/TC 264/WG 15 to validate the standard).NOTE Although the standard is not validated for concentrations over 120 pg/m3 its ranae of application could well beextended to commonly encountered ambient concentrations up to circa 200 pg/m3 when using glass or quartz fibre *** these high concentrations and particulate mass loadings no filter clogging is to be expected. Also the flow rate can beeasily maintained at the nominal *** equivalence procedure in Annex A specifies two approaches, depending on whether the candidatemethod differs slightly or fundamentally from the standard *** the former case, involving only slight differences from the standard method (variations on a theme) AnnexA provides a restricted procedure to compare only the pertinent differences, instead of a full field test. This Qpart of the annex serves to give practical guidance for determining equivalence for measurement methodscommonly used in monitoring networks, and includes examples of common variations to the standard method,such as different filter storing or conditioning procedures and the variation of the standard method for theapplication as automated filter *** the latter case, involving a full set of field tests, the procedure serves to determine equivalence only withinthe rang