GE MOA 280i - Noa Setup for Liquid Measurements

GE Analytical Instruments ©2006 11-8 DLM 14291 Rev. A
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µL of the diluted anti-foaming agent is always added to the purge vessel to
minimize foaming from protein the samples. To dilute the anti-foaming agent:
• Vortex or thoroughly mix the concentrated anti-foaming agent.
• Add 3 mL of deionized water to a vial, falcon tube or other container.
• Use a pipette to withdraw 100 µL of the
antifoaming agent. Since the material is
very viscous, allow sufficient time for the
agent to be drawn into the pipette.
• Add the agent to the water, rinsing the
pipette tip with water to completely
transfer the agent.
The diluted anti-foaming agent is stable for
several months at room temperature. The
emulsion will separate from the water and the
diluted anti-foaming agent should be thoroughly
mixed before use.
NOA Setup for Liquid Measurements
For liquid measurements the NOA is operated in
the Nitric Oxide Mode with Units set to Voltage.
Sensitivity is normally set to High, but for
samples containing >100 µM nitrite or > 250 µM
nitrate, the sensitivity can be set to Low or the
sample diluted. To set to the NOA to the Nitric
Oxide mode (press ENTER to select Menu
Option):
• From the Main Menu, select Control.