28
Annexe 3: Recommended calibration points
No.
Substance
Cell constant
1/cm
Conductivity
mS/cm at 25 °C
Corresp. net wt. NaCl
g/l at 25 °C *
1
Water, de-mineralised
10
< 0.001
0
2
KCl
10
50
28.6
3
KCl
10
100
57.6
1
KCl 0.1 mol/l
50
12.88
7.3
2
KCl 1 mol/l
50
111.88
64.1
3
KCl
50
300
172.1
* Check conductivity of solutions you have produced yourselves by using a reference device compensated for tempe-
rature.
