Radiometer Analytical TitraLab 870, Reference Manual

Page: 279 / 286

Titra Lab ® TitraLab 870 Reference Manual
Page 279
8.5 NaCl 0.05% standard (w/w)
With this standard, the measurements obtained with the TIM870 fit the tables published in
October 1960 by G.F. Hewitt, Atomic Energy Research Establishment, Harwell, U.K.
The
κ
T
conductivity (in µS/cm) is given a function of T temperature by the equation stated by
IEC draft 1980 (*) :
Where:
With:
a0 = 2.11798 10
-2
a1 = 7.86011 10
-5
a2 = 1.54398 10
-7
a3 =-6.26350 10
-9
a4 = 2.27949 10
-11
Temperature range: 0 to 140°C.
(*)
"International Electrochemical Commission", January 1980, "Sub-Committee 66 /WG2".
and :
G. F. Hewit
Chemical Engineering Division
U.K.A.E.A. Research Group
Atomic Energy Research Establishment
Harwell
October 1960.
( )
[ ]
18 1 32 . 873
− × + × =
T b
T T
κ
4 3 2
4 3 2 1 0 T a T a T a T a a b
T
× + × + × + × + =