ApparatusThe apparatus used is a conductivity meter that measures the resistance of the column of liquid between the
Calibration of meterCalibration can be done by replacing the conductivity cell with officially certified precision resistors (accurate to ± 0.1 per cent of the stated value) or an equally accurate adjustable resistance device to give a predicted
MethodAfter the apparatus has been calibrated with a certified reference material solution, rinse the conductivity cell several times with distilled water and at least twice with the aqueous solution under examination. Carry out successive measurements as described in the individual monograph.
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