Metrohm 788 IC Filtration Sample Processor - Manual (Page 25)

2.3 Attaching the accessories
788 IC Filtration Sample Processor
17
Use only ultrapure water or ethanol to clean the dialysis cell;
organic solvents (e.g. acetone) will cause damage to the plexiglas
cell!
2 Prepare filtration membrane
x Use the 6.2831.010 tweezers to extract a new filtration
membrane 50 50 50 50 (6.2714.020) from its packaging and immerse
in a Petri dish containing ultra pure water for approx. 2 min
until the membrane is completely saturated with water.
Because the filtration membrane it is stretched out thereby, it has to
be watered before inserting into the ultra-filtration cell. Otherwise, the
membrane could be crumbled in the cell, which leads to blocking.
3 Insert filtration membrane
x Lay top part 43
43 43 43 on a paper wipe with its inside facing
upwards.
x Insert sealing ring 44 44 44 44 in the appropriate recess in the top part.
x Using the tweezers, place the wet dialysis membrane inside
the sealing ring on the top part of the filtration cell.
Do not connect the dialysis cell with anything other than the
6.2744.000 PVDF compression fittings supplied. If 6.2744.010
PEEK compression fittings are used, stress cracks may appear in the
ultra-filtration cell !
4 Close ultra-filtration cell
x Insert sealing ring in the appropriate recess in top part 43
43 43 43.
x Place top part on bottom part 45
45 45 45 so that both parts lie flush.
x Using the 6.2621.070 Allen key, screw the 5 screws 46
46 46 46 right
in and tighten up.
5 Attach ultra-filtration cell
x Insert the assembled ultra-filtration cell in the cell holder 26
26 26 26
according to Fig. 1 or Fig. 11. The heads of the five screws
46 46 46 46 fit to the small holes of the cell holder.