Thermo Scientific Corona Veo, Operating Manual, Page: 172 / 262

7 • Maintenance and Service
Page 172 Charged Aerosol Detectors Corona Veo (RS) Operating Manual
7.4.3 Flushing the Detector between Analyses
Observe the following guidelines to prevent build-up or accumulation of
residue from the mobile phase, sample matrix and analytes within the
detector between the analyses. This helps maintain consistent response,
optimum performance and reduced detector downtime:
•
Periodically flush the detector with the detector gas flow being
turned on. When using buffer solutions and other additives, it is
recommended to flush the detector daily using compatible solvents
that do not contain additives.
•
Use the solvent with the best solubility characteristics for the sample
matrix and analyte(s) of the analytical method in question.
•
If flushing is done with a stronger solvent than used for your
method, disconnect the detector from the system flow path first and
flush the system to waste (for example, with 20 column volumes).
Then reconnect the detector to the system flow path, turn on the
gas flow and repeat the flushing.
•
Use an evaporation temperature setting of 35 °C when flushing the
detector.
To continue with an analysis, prepare the detector for operation (see
section 6.5, page 121 ).