GC-FID技术在煤焦油芳烃类化合物分析研究中的应用

Application of GC-FID in analysis for aromatic compounds in coal tar

采用气相色谱测定法,应用DB-5毛细管柱,以N,N-二甲基甲酰胺为溶剂,正十二烷为内标物,用内标法对苯、萘、α-甲基萘和β-甲基萘的含量进行测定。结果表明,煤焦油中各组分能很好地分离,实验结果有良好的准确度和精密度,样品回收率在95.5%~103.3%,相对标准偏差为1.72%~7.75%。

Internal standard method is developed for the determination of the content of benzene,naphthalene,α-methylnaphthalene andβ-methylnaphthalene in coal tar by using gas chromatography,which employs a DB-5 capillary column and with DMF used as the solvent,and n-dodecane as internal standard.The results show that every composition in coal tar could be well separated.The experimental results are accurate and precise.The recovery rates are 95.5%~103.3%,and the relative standard deviations are between 1.72%~7.75%.