Measurement of VOCs by Thermal Desorption GC-MS Using Hydrogen Carrier Gas

User Benefits

- Analysis is possible using hydrogen, which is economical and stably available, as the carrier gas as an alternative to helium gas. - Thermal desorption GC/MS enables high throughput analysis of VOCs because solvent extraction work is not required.

Introduction

In GC/MS analysis, helium is generally used as the carrier gas, but instability of helium gas supplies has become a problem in recent years. Since the analysis itself must be stopped if this carrier gas cannot be obtained, analysis using hydrogen as a carrier gas in place of helium has attracted attention. When hydrogen gas is used, sensitivity to specific compounds may be inferior to that with helium gas, but hydrogen gas has the advantages of low cost and stable availability. The Shimadzu TD-30 Series thermal desorption system supports the use of hydrogen as a carrier gas in addition to the helium and nitrogen. Therefore, in this experiment, volatile organic compounds (VOCs) were measured with a TD-30R+GCMS- QP2020 NX system using hydrogen as the carrier gas. The VOCs are harmful volatile organic compounds that exist in air and are monitored under various environments, such as factories, urban areas, and indoor environments, as one index of the level of atmospheric pollution. Efficient thermal desorption (TD)-GC/MS, which does not require solvent extraction, was used in this VOC measurement. Here, an analysis of the VOCs which are frequently analyzed using hydrogen as the carrier gas was conducted by TD- GC/MS, and linearity and repeatability were confirmed. The reader may also refer to Application News 01-00366-EN in which nitrogen was used as the carrier gas in place of helium in the VOC measurement.

23 de mayo de 2023 GMT