Thermo Scientific Dionex ICS-5000 Operator's Manual page 406

Dionex ICS-5000 Operator's Manual
•
Gloves
•
Tweezers
Working Electrode Polishing Procedure
NOTE
To avoid electrode fouling, always wear gloves when han-
dling electrodes.
1. Follow the instructions in
remove the working electrode from the cell.
2. Prepare the polishing pads:
a. Designate a pad for use with the coarse polishing compound.
b. Designate another pad for fine polishing compound; also designate
the working electrode type with which it will be used.
NOTE
c. Designate a pad that will not be used with polishing compound. This
pad is for removal of particles after polishing
d. Moisten the suede side of the polishing pad slightly with water and
place the pad on a smooth, flat surface, with the suede side facing up.
3. Polish the electrode:
•
If you are polishing the electrode before initial installation, use only
the fine polishing compound.
•
If you are polishing the electrode because of degradation of
performance, such as increased baseline noise or tailing peaks, first
use the coarse polishing compound. Then, repeat with the fine
compound.
a. Sprinkle about one-half gram of polishing compound in the center of
the suede side of the polishing pad. Add enough ASTM Type I
(18 megohm-cm) filtered and deionized water that meets the
specifications listed in
390
Section
Do not use the same fine polishing pad to polish more
than one type of working electrode; this can contami-
nate the electrode surface with microparticles from the
other working electrodes.
Section 1.5
9.28.3, Step 1 through
(see Step
to make a thick paste.
Step 4, to
5).
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