Figure 15–6: ASTM noise values as a function of cell spacing
Figure 15–7: Noise traces as a function of cell spacing
Pump pulsations and pressure rise
SenCell spacing position 3 corresponds to approximately 100 ± 10 µm. The spacings used with
the SenCell under test in this experiment were determined using a stylus profilometer.
Note:
Optimization of the cell working volume focuses on finding the right balance between
signal height and noise level for your SenCell, under your specific LC-EC conditions. You can
achieve optimization by decreasing the cell spacing in small steps and evaluating the baseline
noise and peak height of the analytes of interest until you find the optimal signal-to-noise ratio.
Note that with LC applications using larger ID columns in combination with higher flow rates, the
minimum spacing that can be used is larger.
Inexperienced users should use the factory-preset cell working volumes (position 1 or 2) with
their SenCell.
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