The Agilent 1260 Infinity III SFC Control Module is responsible for all tasks connected to pre- and post-conditioning of the mobile phase. In contrast, flow rate, mobile phase composition, detection, column temperature and data analysis are controlled by the modules of the SFC system in combination with the ChemStation software. This includes metering the carbon dioxide flow and mixing the modifier into the mobile phase by the SFC binary pump.
In detail, the SFC Control Module uses vapor-phase carbon dioxide, redestills it to the liquid state and boosts its pressure to just under the column head pressure. Since the CO₂ gas is a very poor solvent, most contaminants in the carbon dioxide are left in the source, which allows for the use of inexpensive, beverage-grade CO₂, unlike in any other commercially available instrument. The SFC control module further recollects the effluent from the UV (or other) detector and controls the back-pressure up to 400 bar over the complete system.
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id: 4540111755