Tip!
Adjust the horizontal micrometer setting to direct the liquid spray from the
TurboIonSpray probe away from the aperture to prevent contamination of the aperture; to
prevent piercing of the flow of the gas for the Curtain Gas interface, which can create an
unstable signal; and to prevent electrical shorting due to the presence of the liquid.
5. Use the vertical micrometer to adjust the probe position in small increments to achieve the
best signal or signal-to-noise ratio.
Note:
The vertical position of the probe depends on the flow rate. At lower flow rates, the
probe should be closer to the aperture. At higher flow rates, the probe should be farther
from the aperture.
6. Adjust the black electrode adjustment nut on the probe to move the electrode tube in or out
of the probe (to adjust the protrusion).
Note:
The electrode tip should protrude between 0.5 mm and 1.0 mm from the end of the
probe.
The optimal setting for the electrode tip is compound-dependent. The distance that the
electrode tip protrudes affects the shape of the spray cone, and the shape of the spray cone
affects mass spectrometer sensitivity.
Figure 4-1 Electrode Tip Extension Adjustment
Item
Description
1
Probe
2
Electrode
Ion Source Optimization
System User Guide
RUO-IDV-05-6475-C
SCIEX 3200 Systems
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