Table of Contents
Advertisement
3.8
Verifying Operational Status
After the system has equilibrated, verify the actual pump pressure and stability by
monitoring the pump pressure.
Record the short-term pressure fluctuations; they should be less than 0.13 MPa
(20 psi). If the pressure fluctuates by more than this amount, prime the pump (see
Section
3.6).
3.9
Configuring Standby Mode
The Dionex Easion can be configured to enter standby mode after a period of
inactivity (defined as a period of time in which no data collection and no input
from Chromeleon has occurred). In standby mode, the pump flow rate is reduced.
•
Configure the standby mode in the Chromeleon Instrument Configuration
Manager (in the Dionex Easion Properties dialog box).
•
To cancel standby mode and return the pump to the normal flow rate, either
turn on the pump from the Chromeleon ePanel or start a new sequence.
3.10 Preparing Samples
NOTE Sample preparation can be performed while the system
3.10.1 Collecting and Storing
•
Collect samples in high density polyethylene containers that have
been thoroughly cleaned with ASTM Type I (18.2 megohm-cm)
filtered and deionized water. Do not clean containers with strong
acids or detergents. These will leave traces of ions on the container
walls, and the ions may interfere with the analysis.
•
If samples will not be analyzed on the day they are collected, filter
them through clean 0.45 m filters immediately after collection;
otherwise, bacteria in the samples may cause the ionic concentrations
to change over time. Refrigerating the samples at 4
reduce, but not eliminate, bacterial growth.
Doc. 155028-01 08/20
is equilibrating.
3 • Operation and Maintenance
C (39
F) will
35
Advertisement
Table of Contents
