12
Operation Manual Mütek
TM
PCD-05, September 2017
© BTG
II. Product description
2.1.1
Measuring principle
Streaming potential measurements with the Mütek™
PCD-05 are based on the principle shown schematically
in Fig. 2-1. The central element is a plastic measuring
cell (4) with a fitted displacement piston (5).
If an aqueous sample is filled into the measuring cell,
colloidally dissolved molecules will adsorb at the plastic
surface of the displacement piston and on the cell walls
under the action of van-der-Waal forces. The micro-
sized counter-ions remain comparatively free to move.
A defined narrow gap is provided between cell wall and
displacement piston. Driven by a motor (6), the displa-
cement piston (5) oscillates in the measuring cell (4)
and creates an intensive liquid flow which entrains the
free counter-ions, thus separating them from the adsor-
bed sample material.
At the built-in electrodes (3), the counter-ions induce a
current which is evaluated digitally (2) before it is shown
on the display (1) as streaming potential with the appro-
priate sign.
Fig. 2-1
Schematic of test setup
Designations
1
Display
4 Plastic measuring cell
2
Electronic
5 Displacement piston
3
Electrodes
6 Motor
1
2
4
5
6
3
Содержание Mutek PCD-05 Smart
Страница 1: ...Operation Manual MütekTM PCD 05 Smart Light Particle Charge Detector ...
Страница 50: ...50 Operation Manual MütekTM PCD 05 September 2017 BTG V Measuring ...
Страница 58: ...58 Operation Manual MütekTM PCD 05 September 2017 BTG VIII Shutting down the system storage and disposal ...
Страница 61: ......
Страница 62: ...BTG Instruments AB P O Box 602 SE 661 29 Säffle Sweden Phone 46 533 426 00 www btg com ...