50
Tip:
It is possible that the brush assemblies on a rotator that has been in
use for some time may have been replaced or swapped, and thus,
the colors of the brushes may not be as described in the previous
paragraph or as shown in Figure 4.9.
The important concept to remember is that the UPPER pair of
brushes contacts the disk electrode, and the LOWER pair of brushes
contacts the ring electrode.
Figure 4.9: Brush Connections for a Rotating Ring-Disk Electrode (RRDE)
Tip:
A bipotentiostat is required when working with a rotating ring-disk
electrode. A bipotentiostat provides independent control of two
different working electrodes in the same electrochemical cell.
Note:
Cell cables on newer model Pine bipotentiostats use RED and
ORANGE to mark the first working electrode drive and sense lines,
respectively. Both of these cables must be connected to the UPPER
pair of electrode brushes (red) to contact the disk.
Cell cables on newer model Pine bipotentiostats use BLUE and
VIOLET to mark the second working electrode drive and sense lines,
respectively. Both of these cables must be connected to the lower
pair of electrode brushes (blue) to contact the ring.
Summary of Contents for MSR 636A
Page 2: ......