8.
Place a 0.002"-thick TG-2M cell gasket (MF-1046) over the two registration pins on the
steel auxiliary electrode block, keeping the long axis of the cut-out in a horizontal ori-
entation. Align the WORKING ELECTRODE BLOCK in the configuration desired. Note
the orientation of the dual electrodes in relation to the flow through the thin-layer cell
(Figure 3.12). The steel backing plate fits behind the working electrode. The two regis-
tration pins of the backing plate should occupy the two opposing holes of the working
electrode block not occupied by the auxiliary electrode block. You may also use this
plate as a convenient handle when polishing the working electrode.
Figure 3.12.
Placement of thin-layer gasket and orientation of working electrode for Single Electrode, Dual Series, and Dual
Parallel Operation.
NOTE: The gaskets determine the dead volume in your thin-layer cell. You can stack gas-
kets on top of each other to increase the dead volume of the cell. Additional gasket
thicknesses are available for separate purchase [e.g., TG-5M = 0.005" (127
µ
m) thick,
TG-15M = 0.015" (381
µ
m) thick, TG-2M = 0.002" (51
µ
m) thick]. Dead volume de-
termines how FAST the sample flows through the cell. Changing gaskets allows you
to influence this rate of flow independently of the flow through the rest of your LC sys-
tem. The TG-2M gasket is recommended for most applications. In some cases (e.g.,
microbore), a very thin gasket (MF-1044) may be desirable. In other cases (e.g., amal-
gam electrodes), a thicker channel is preferred.
9.
Slip the clamp into place with the crossbar under the projecting arms of the auxiliary elec-
trode, and screw until tight. Don’t be excessively forceful when tightening.
NOTE: Some users prefer to mount the working electrode directly to the auxiliary elec-
trode with screws rather than the clamp. This mounting is available as an option by
purchasing a stainless steel backing plate (P/N MR-1006) and stainless steel screws
with a hex wrench (P/N MF-1049). To mount the working electrode, put the backing
plate behind the working electrode and insert two screws through the entire sandwich
into the threaded holes. Tighten securely.
FLOW
Single
Electrode
Operation
FLOW
Dual (Series)
FLOW
Dual (Parallel)
Section 3. Installation
18
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