环境监测用乙酸乙酯气体标准样品制备方法研究  

Preparation Method of Ethyl Acetate Gas Standard for Environment Monitoring

作　　者：杜健 杨静 钱萌 李宁 DU Jian;YANG Jing;QIAN Meng;LI Ning(State Environmental Protection Key Laboratory of Environmental Pollutant Metrology and Reference Materials, Institute for Environmental Reference Materials, Beijing 100029, China)

机构地区：[1]环境保护部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

出　　处：《化学试剂》2018年第7期670-672,698,共4页Chemical Reagents

摘　　要：依照GB/T 5274—2008《气体分析校准用混合气体的制备称量法》的相关要求开展了浓度水平为1μmol/mol氮气中乙酸乙酯气体标准样品的研制工作。根据乙酸乙酯的物理化学性质确定了采用两步稀释的方法进行样品制备。建立了样品的分析方法,对分析方法精密度、制备重现性及制备的线性进行了考察。针对国产普通气瓶和国产涂层气瓶开展气瓶内壁的吸附作用研究,确定采用国产涂层气瓶制备乙酸乙酯气体标准样品。结果表明,研制浓度水平为1μmol/mol氮气中乙酸乙酯气体标准样品是可行的,将继续开展时间稳定性、瓶内均匀性等内容的研究,将为相关环境监测工作提供技术支持。Accordance with the relevant technical requirements of GB/T 5274—2008 gas analysis-preparation of calibration gas mixtures-gravimetric method,ethyl acetate gas standard with concentration level of 1 μmol/mol was prepared.Based on the physical and chemical properties of ethyl acetate,the preparation method was determined with two steps dilution.The precision of analysis method,linearity and reproducibility of preparation were investigated.The adsorption of cylinder inner wall based on domestic coated and ordinary cylinders was investigated.Based on the result of adsorb ability,the domestic coated cylinder was used to prepare ethyl acetate gas standard.The result of this work suggest that development ethyl acetate gas standard with 1 μmol/mol was feasible.Future research will focused on the homogeneity and long term stability,that will provide technical support for environmental monitoring.

关 键 词：乙酸乙酯 气体标准样品 环境监测 制备 

分 类 号：X830.5[环境科学与工程—环境工程]