室内空气TVOC检测用混合标准气体的制备及性能研究  

Development of TVOC Gas Standard for Indoor Air Quality Monitoring

作　　者：杨静 杜健 李宁 高冰 倪才倩 YANG Jing;DU Jian;LI Ning;GAO Bing;NI Cai-qian(Institute for Environmental Reference Materials Ministry of Environmental Protection,State Environmental Protection Key Laboratory of Environmental Pollutant Metrology and Reference Materials,Beijing 100029,China)

机构地区：[1]生态环境部,环境发展中心环境标准样品研究所,国家环境保护污染物计量和标准样品研究重点实验室,北京100029

出　　处：《化学试剂》2021年第3期355-360,共6页Chemical Reagents

基　　金：国家重点研发计划项目(2016YFC0208100)。

摘　　要：采用液态组分气化填充装置,以称量法制备了浓度水平为1μmol/mol的氮气中9种VOCs混合标准气体,其组分涵盖了《室内空气质量标准》中TVOC检测指标。研究建立气相色谱-氢火焰离子化检测器分析方法对包含的组分进行分离分析。通过制备方法的重复性评估和不同种类的国产气瓶筛选,确定了采用重量法和Ⅱ型镀层气瓶可以满足制备标准气体要求。此外,采用均匀性和稳定性实验考察了标准气体的性质。最终,将制备的标准气体与有证气体标准样品进行比对,确认其量值准确、可靠。该标准气体可以作为环境监测站、检测机构和科研机构等在相关研究过程中质量控制和质量保证的技术基础。A gas standard mixture containing 9 volatile organic compounds(VOCs) was prepared using gravimetric method and a gasifying apparatus developed in-house.The components of the gas standard cover the TVOC measurement indicators of "Indoor air quality standard".The concentration of each component was determined using a gas chromatograph with flame ionization detection(GC-FID).The weighing method and Ⅱ-type coating cylinder were proved to be applicable by assessment of the preparation method and selection of cylinder.Also,the stability at different pressures and time were examined.Finally,comparison test with certified reference material was performed to ensure accurate valve.The gas standard can be the technical basis for quality control and quality assurance in the environmental monitoring stations,sample testing organizations and scientific research institutions of relevant research process.

关 键 词：室内空气质量 气体标准样品 苯系物 正十一烷 乙酸丁酯 总挥发性有机物 

分 类 号：X830.5[环境科学与工程—环境工程]