氮气中14种芳香烃混合气体标准样品的研制  

Development of standard gas mixture of 14 aromatic hydrocarbons in nitrogen

作　　者：王倩[1] 杜健[1] 钱萌[1] 李宁[1] 王帅斌[1] 樊强[1] 

机构地区：[1]环境保护部标准样品研究所,北京100029

出　　处：《化学试剂》2013年第12期1101-1104,共4页Chemical Reagents

基　　金：2013年度环保公益性科研专项(20130913)

摘　　要：介绍了氮气中14种芳香烃混合气体标准样品的制备和定值方法。气体标样的组分是苯、甲苯、乙苯、对二甲苯、间二甲苯、邻二甲苯、苯乙烯、氯苯、1,3,5-三甲苯、1,2,4-三甲苯、1,4-二氯苯、1,3-二氯苯、1,2-二氯苯、1,2,4-三氯苯,浓度水平为1μmol/mol。通过制备重现性、浓度线性关系、均匀性和稳定性的考察,气体标样在气瓶内均匀性良好,扩展相对不确定度分别为3%～7%。A method for the preparation of the standard gas mixture with 14 aromatic hydrocarbons such as benzene, methylbenzene, ethyl benzene, p-xylene, m-xylene, o-xylene, styrene, ehlorohenzene, mesitylene, 1, 2, 4-trichlorobence, 1,4-dichlorobenzene, 1,3-dichlorobenzene, 1,2-dichlorobenzene, 1,2,4-trimethylbenzene, at the concentration of 1 μmol/mol in nitrogen was developed. The reproducibility of this method, the linear relationship of concentrations, the homogeneity and long-term stability of the standard gas mixture were evaluated. The expanded relative uncertainties of 14 components are 3%～7% respectively by uncertainty evaluation.

关 键 词：芳香烃 气体标准样品 均匀性 稳定性 不确定度 

分 类 号：O659.12[理学—分析化学]