Metrohm 6.02729.110, Руководство пользователя

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6.2 Replacing the filtration membrane ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
22
￭￭￭￭￭￭￭￭
IC equipment: Inline Ultrafiltration 2 - push mode
The concentration of the following 7 anions was determined for each
sample type: F
–
, Cl
–
, NO
2
–
, Br
–
, NO
3
–
, HPO
4
2–
, SO
4
2–
.
Table 3 Service life of the filtration membrane
Sample designation Number of samples per filter
Orange juice with fruit pulp 40
Surface water 500
Drinking water 1,000
Ground water 500
Waste water 1 1,000
Waste water 2 130
Waste water 3 40
Waste water 4 80
NaCl solution (1%) 5,000
Schöniger absorption solution 100
Acidic earth extracts 1,000
Aqueous earth extracts 200
6.2 Replacing the filtration membrane
The filtration membrane used has to be in perfect condition in order to
ensure a consistent quality of the analysis results. Therefore, replace the
filtration membrane in regular intervals
(see chapter 6.1, page 21) .
Replacing the filtration membrane
Accessories
￭
Filtration membrane 1 (6.2714.020)
￭
4 mm hex key (6.2621.030)
￭
Plastic tweezers (6.2831.010)
1 Taking the ultrafiltration cell out of the system
￭
In the software, stop the system and wait until the pressure has
been released.
￭
Remove all capillaries from the ultrafiltration cell.
￭
Take the ultrafiltration cell out of the holder.
2 Cleaning the ultrafiltration cell
Carry out the instruction steps 2 to 8 of the procedure Inserting the
filtration membrane on page 10 .