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1.2 Low-Pressure Gradient System
In the low-pressure gradient system, two or more solvents are
mixed in its low-pressure section from which a liquid feed is
performed by a single pump. The composition of an eluent is
made to vary with time in chromatographic separation.
Fig. 1-2 Low Gradient System
(1) Each of plural eluents is fed from the degassing device to
the low-pressure unit.
(2) In the low-pressure unit, the eluents are mixed at a pre-
specified ratio.
(3) Through the mixer, the mixture eluent is delivered.
(4) A sample is injected by the autosampler.
(5) The injected sample is separated through the column which
is maintained at a constant temperature by the column oven.
(6) Each component separated from the sample is detected as
a signal by the detector.
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