Record the Flux Value
Record the normalized flux value in your laboratory notebook or production records as a benchmark
for future comparison. If the cassette is used, compare the flux with previously obtained values to
determine the performance of the cassette over time. Many users replace cassettes when, after
cleaning, the normalized water flux falls below 60 to 80 percent of the normalized flux value when the
cassette was new.
If after cleaning, the flux is low, you can try alternative, aggressive cleaning processes. Contact Cytiva
for more information.
Table 6.1: Viscosity correction factors
Temperature in °C
when permeate
flow was measured
Viscosity
correction factor
Temperature in °C
when permeate
flow was measured
Viscosity
correction factor
4
1.567
25
0.890
5
1.519
26
0.871
6
1.472
27
0.851
7
1.428
28
0.833
8
1.386
29
0.815
9
1.346
30
0.798
10
1.307
31
0.781
11
1.271
32
0.765
12
1.235
33
0.749
13
1.202
34
0.734
14
1.169
35
0.719
15
1.139
36
0.705
16
1.109
37
0.692
17
1.081
38
0.678
18
1.053
39
0.665
19
1.027
40
0.653
20
1.000
41
0.641
21
0.978
42
0.629
22
0.955
43
0.618
23
0.933
44
0.607
24
0.911
45
0.596
6 Preparing a Cassette for Use
6.3 Stage 2 – Measuring water flux
Learning to Use the Kvick Lab Cassette Holder User Manual 18117269 AI
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