用气相色谱法测定工业三聚甲醛溶液中甲醛、甲醇、甲酸甲酯、甲缩醛、二氧戊环、苯含量  

Determination of Formaldehyde,Methanol,Methyl Formate,Methylacetal,Dioxolane and Benzaldehyde in Industrial Trioxane Solution by Gas Chromatography

作　　者：杨向龙 张衡 YANG Xianglong;ZHANG Heng(Coal Chemical Branch,Shenhua Ningxia Coal Industry Group Co.,Ltd.,Yinchuan 750411,China)

机构地区：[1]神华宁夏煤业集团煤化工分公司,宁夏灵武750411

出　　处：《宁夏工程技术》2020年第2期110-113,共4页Ningxia Engineering Technology

摘　　要：针对现有色谱分析法测定时间长、相对保留时间漂移大、色谱柱流失快等问题,筛选出一种能够分离工业三聚甲醛溶液中各个组分的毛细管色谱柱,后续对色谱仪柱温、载气流速等典型色谱条件进行了优化。结果表明,色谱分析时间从23 min缩短至14 min,各个组分分离度均大于1.5,对称因子几乎接近于1,甲醛、甲醇、甲酸甲酯、甲缩醛、二氧戊环、苯、三聚甲醛的检出限依次为0.0065%,0.0070%,0.0088%,0.0080%,0.0080%,0.0102%,0.0123%。In view of long determination time,large drift of relative retention time and fast loss of chromatographic column,etc.,a capillary column for separating the components in the trioxane solution is screened.The typical chromatographic conditions including column temperature and carrier gas flow rate are optimized.The results show that the analytical time is shortened from 23 minutes to 14 minutes,and the resolution of each component is higher than 1.5,the detection limits of formaldehyde,methanol,methyl formate,methylal acetal,dioxolane,benzene and trioxane are 0.0065%,0.0070%,0.0088%,0.0080%,0.0080%,0.0102%,0.0123%,respectively.

关 键 词：三聚甲醛 甲醛 气相色谱 

分 类 号：O657.7[理学—分析化学]