High-Sensitivity Gas Analysis Using the GCMS-QP2050 and GI-30 Auto Gas Injector

User Benefits

- Analyzing gas samples with the GCMS-QP2050 enables high-sensitivity measurements of trace inorganic gases and light hydrocarbons. - Gas analysis using GC-MS supports quantitative determinations and qualitative identification of unknown components in gas samples through mass spectral library searches, without the need for standard substances. - Using the GI-30 Auto Gas Injector enables automated, continuous gas analysis, reducing operator workload while achieving reproducibility comparable to liquid sample injection.

Introduction

Gas analysis is conducted across a wide range of fields, including resources, energy, and the environment. Typical targets include inorganic gases such as H₂, CO, and CO₂, and light hydrocarbon gases starting with CH₄, with analyses primarily performed using GC. In Application News No. 01-00858, examples of gas sample analysis using TCD and BID installed on the Brevis GC-2050 were presented. However, qualitative analysis by GC requires standard substances, making the identification of unknown impurities in gas samples difficult. Furthermore, in inorganic gas analysis, complete chromatographic separation of peaks can be challenging, and when GC fails to fully separate them, both qualitative and quantitative analysis become difficult. In contrast, gas analysis using GC-MS enables qualitative identification of unknown components without standard substances through mass spectral library searches. Quantitation in GC-MS is performed using mass chromatograms, allowing accurate measurements even when peaks overlap. In this Application News, high-sensitivity analysis of inorganic gases and light hydrocarbon gases was performed using the compact yet high-performance GCMS-QP2050. Gas samples were introduced using the GI-30 Auto Gas Injector, enabling automated, continuous analysis and delivering higher reproducibility than manual sample injection.

October 21, 2025 GMT