利用固相萃取和气质联用技术定性空气中的污染物  

Detection of organic pollutants in air with SPE and GC-MS

作　　者：杨彩玲[1] 黄永忠[1] 张海霞[1] 刘满仓[1] 

机构地区：[1]兰州大学化学化工学院,甘肃兰州730000

出　　处：《兰州大学学报（自然科学版）》2005年第1期57-59,共3页Journal of Lanzhou University(Natural Sciences)

摘　　要：为了定性兰州地区空气中的有机污染物,用GDX 502和GDX 101混合吸附剂自行装柱采集空气样品,少量二氯甲烷-乙醚混合有机溶剂淋洗采样管和热解吸浓缩进样装置两种方式进行脱附被吸附物质,最后进行气质联用检测.结果表明用混合吸附剂能更有效吸附各类污染物,在一个样品中最多能检测到380余个物质.样品脱附方法节省有机试剂和时间,避免大量有机溶剂再次污染空气,并且操作简单,所建立的方法有很好的灵敏度,能满足检测空气质量的需要.Air samples were collected from Lanzhou city by mixed sorbents GDX 502 and GDX101 in glass tubes. The air samples eluted by a certain volume of mixed organic solvents and concentrated by N2, or desorbed from sorbents in glass tubes by a device named 'heated desorption and concentration injector'. The obtained samples were injected into GC-MS and the substances in the samples were separated and qualitative analysis was made of the substances which had higher concentration. The experimental method was easy to operate and as many as 380 substances were detected in a sample. The method showed a better sensitivity and a shorter running time for a sample. Meanwhile, it avoided further pollution in air owing to using less volume of organic solvents.

关 键 词：空气污染物 气质联用 混合吸附剂 

分 类 号：O625.6[理学—有机化学]