Analysis of volatile organic compounds inside a vehicle using thermal desorption-GC-MS
Introduction
Thermal desorption (TD) is a GC pretreatment device for introducing gas samples such as atmospheric air and indoor air. It can also be used for gases generated from solid or liquid samples. Figure 1 shows an overview of TD operation. ① Sampling: Using a pump, etc., the gas sample is passed through and collected in a sample tube containing an adsorbent. ②Tube desorption: The sample tube is heated in the TD device, and the desorbed gas is collected in a cooled focusing trap. ③ Trap desorption: The focusing trap is heated at high speed and the desorbed gas is introduced into the GC in a narrow band width. These two steps of thermal desorption make it possible to obtain high sensitivity and sharp chromatogram peaks.
In this MSTips, we introduce the analysis of volatile organic compounds (VOCs) inside a vehicle, which is one of the main applications of TD-GC-MS. TD-100xr (Markes International Ltd) and JMS-Q1600GC (JEOL) were used in the experiment. The analysis conditions were based on the international standards ISO 12219-1 and JASO Z125.