Advantages of using tube-based thermal desorption for monitoring chemical warfare agents at ultra-trace levels
Application Note 157
Chemical warfare agents (CWAs) and their respective simulants were analysed using Markes’ tube-based systems. The study included the use of both 89-mm (3.5-inch) standard tubes and 114-mm (4.5-inch) depot area air monitoring systems (DAAMS) tubes, desorbed using standard- or DAAMS-configured automated thermal desorbers, respectively, connected to gas chromatography–mass spectrometry (GC–MS) or gas chromatography–mass spectrometry–flame photometric detection (GC–MS–FPD) instruments.
Two recent TD innovations were evaluated – enhanced internal standard addition and multi-tube trap stacking – to explore what advantages they offered for monitoring CWAs at ultra-trace levels.