26_LC-page8 - Each type of system has its own advantages...

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Unformatted text preview: Each type of system has its own advantages and disadvantages. Is the solvent reservoir limited? Does it produce pressure pulses? Can a gradient be produced? solvent outlet b gas inlet d convection current baffle e a - syringe b - seal c - gearing d - motor e - fill system Another non-pulsating system with a limited reservoir. Stepper motor/gear system allows for very fine flow control. One of the most common type of systems. g a - motor b - gear c - seal d - piston e - solvent in f - check valves g - solvent out d f b to column c solvent c a Unlimited reservoir system but expensive. Another problem is that it produces variable pressure - must reverse stroke to refill. a e pump fill ...
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