Capillary-Coupled Quadrupole Mass Sampling for High-Pressure In-Situ Cells

A coupling structure is introduced as an intermediary component between the mass spectrometer electro quadrupole and the high-pressure reaction environment. This coupling structure includes a pressure reduction mechanism that mediates the pressure difference, allowing the mass spectrometer to operate in its optimal vacuum range while enabling analysis of gases from high-pressure environments (1 to 10 bar). The intermediary structure resolves the contradiction by translating between different pressure regimes.

The system is segmented into distinct functional modules: the original ultra-high vacuum characterization instrument remains unchanged, while a separate coupling structure handles the high-pressure gas sampling and pressure reduction. This segmentation allows the mass spectrometer to maintain its original vacuum-operated design while the coupling structure manages the high-pressure interface, thus expanding adaptability without increasing the complexity of the core instrument.

The coupling structure serves multiple functions: it interfaces high-pressure gas sources with the mass spectrometer, performs pressure reduction, enables online gas composition analysis, and maintains compatibility with the existing ultra-high vacuum instrument. By making the coupling structure multi-functional, the solution avoids the need to purchase separate specialized equipment for high-pressure analysis, thereby significantly reducing costs while achieving the desired pressure range extension.