Analysis of additives in polypropylene products 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. In this MSTips, we introduce the analysis of additives in polypropylene products as the application of TD-GC-MS to material analysis. Figure 1 shows an overview of TD operation for measuring generated gas from a solid sample. ① Sampling: Seal the sample into an empty sample tube. If necessary, add the glass wool to fix the sample. 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.