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...Flow scheme for gc reprised high performance liquid chromatograph sample mix is separated on solvents short packed column selected by quaternary components mixing valve a detected at detector hplc pump d injector port solenoid b in here too exiting mixture pressure sucks discarded into and through c injected combined with chromatogram vs thermal ramp solvent oc gas mobile phase he produced often split not species can lost during detection be recovered chemical apps common biological m capillary columns long single piston must achieve maximum of mpa pressures without leaking or seal failure atm psi...