车间空气中双乙烯酮的热解吸气相色谱测定方法的研究

Study on Method of the Workplace air-Determination of dikten-Thermal desorption gas Chromatographic

车间空气中的双乙烯酮采集在硅胶上， 用热解吸经ＳＥ－ ３０ 柱分离， 氢焰离子化检测器气相色谱法测定， 方法的检出限为２×１０－ ３μｇ。标准曲线线性范围２－ ４０ｍ ｇ／ｍ ３，解吸效率９３．５％ ，５００ｍ ｇ 硅胶的穿透容量为０．５８ｍ ｇ。双乙烯酮样品可保存五天。本方法准确度高、精密度好、快速简便。

Dikten in air were collected with silicagel with Thermal desorbed and Separted by SE-30 chromatographic column and determined by GC-FID. Detectable limit is 2×10 -3 μg(injection Volume 1ml). The linear range of standard curve was 2-40mg/m 3,and the precision RSD=4.8%-10.1%,and desorbtion efficiency 93.5%. The pass through capacity is 0.58mg Dikten, while the amount of silicegel is 500 mg. The sampling tube be preserved 5 days. This method is rapidity convenience accuracy and reliablity.