
17
T2 should be selected as a typical sample temperature and should be
approximately 10°C different from T1. The temperature coefficients of the
following electrolytes generally fall into the ranges shown below:
Acids
: 1.0 - 1.6%/°C
Bases
: 1.8 - 2.2%/°C
Salts
: 2.2 - 3.0%/°C
Drinking water
: 2.0%/°C
Ultrapure water
: 5.2%/°C
Average temperature coefficients of standard electrolyte solutions expressed
as %/°C of the conductivity value at 25°C
Temp.
range°C / °F
KCl 1 M
KCl 0.1 M
KCl 0.01 M
Saturated
NaCl
15 – 25
°C
59 – 77
°F
1.725
1.863
1.882
1.981
15 – 25 – 35
°C
59 – 77 – 95
°F
1.730
(15–27°C)
1.906
1.937
(15–34°C)
2.041
25 – 35
°C
77 – 95
°F
1.762
(15–27°C)
1.978
1.997
(25–34°C)
2.101
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