Thermo Scientific Vanquish VF-D20, Operating Manual, Page: 121 / 182

7 • Maintenance and Service
Vanquish Charged Aerosol Detectors Operating Manual Page 121
7.4.2 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 that 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 following the
guidelines under
Before Starting Sample Analysis
(see section 6.5,
page 92 ).
7.4.3 Cleaning or Decontaminating the Detector
Cleaning and decontamination must be performed by qualified
personnel wearing suitable personal protective equipment. Always
observe national and local regulations.
NOTICE Wipe up all liquids spilled onto the system immediately. If
surfaces are exposed for longer periods, these liquids can cause damage.
Decontamination
Decontamination is required, for example, when leakage or spillage has
occurred, or before service or transport of the detector. Use a suitable
cleaning detergent or disinfectant to ensure that the treatment renders
the detector safe to handle.