Hello,

My question is on the ac impedance measurement of composite polymeric films. From each measurement, I generally calculate the bulk resistance.The problem which I encountered is that when I measured the same sample at two different frequency range (viz., 100mHz - 7MHz and 100mHz - 5MHz), it gave me two different results. I am totally confused to consider the correct one. The conductivity of the films is in the range of 10-7 to 10-4  Scm-1.

So my concern is that which frequency range I should use for the measurement. or which is the preferred frequency range for such type of measurement ?

If anybody could clarify the problem,  it would be of great help for me.

Thank you.

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