PerkinElmer OilExpress System, Руководство пользователя

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Introduction . 21
2-Port Flowcell
The 2-port flowcell (Figure 11) is used in a sample shuttle so that a background spectrum
can be collected regularly if sampling times are long, or to compensate for changing
environmental conditions. The sample shuttle moves the flowcell in and out of the beam
between collecting a background and sample spectrum.
Flowcells are fitted with zinc selenide (ZnSe) windows for use with mid infrared
spectrometers. Each flowcell is fitted with two windows.
Figure 11 The 2-port flowcell
Filling and emptying the flowcell
In the 2-port flowcell, the sample enters the flowcell at the bottom of the cell. When the cell
is emptied, the sample is pushed back out of the bottom of the flowcell, up through the
transfer port and evacuates to waste by gravity.
Rinsing the flowcell
When the flowcell is rinsed, the solvent enters the flowcell at the top of the cell, and leaves it
at the bottom, then passes through the transfer/wash port to waste.