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電導率微電極
Calibration
Any cell that has been stored dry should be soaked in distilled or de-ionized water for 24 hours
prior to use to assure complete wetting of the cell
電導率微電極
Each conductivity cell manufactured is calibrated to obtain, as close as possible, a cell constant (K) of
1.0/cm using the 0.01 N KCl solution method as determined by Jones and Bradshaw in 1937. However, to
obtain more accurate results, you should calibrate the cell and calculate a new cell constant using
conductivity standards that more closely resemble the anticipated range of your sample as well as the size
of your samples.
You may use the standard solution and the following table to check the accuracy of the cell's constant or
to determine an unknown constant.
The formula is K= (k1 +k2)(1/R)
K = cell constant in c.g.s. metric units (/cm)
1/R = measured conductance in micromhos
k1 = conductivity in absolute micromhos/cm from table below
k2 = Conductivity in absolute micromhos/cm of the distilled water used in making the solution
Note: 1/R, k1 and k2 must either be determined at the same temperature or corrected to the
same temperature to make the equation valid
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