All the experimental results obtained were averaged from experiments carried out several times to ascertain the repeatability and reproducibility of data. The values computed for the circuit components were averaged over several sets of experiments. The error in computed values remained within 1% of the averaged value.
The trend corroborated in the higher frequency range and was probably brought about by the same factors on the micromolecular scale. A summary of the trends of each circuit component is summarized in Table 1.
Fig. 6. (a) Contact resistance (R1), charge transfer resistance predominant at high frequencies (R2) and charge transfer resistance predominant at low frequencies (R3) as a function of ammonia concentration. Each data point reported is an average of at least 3 readings to ensure repeatability. The experimental data was well within the error limit of ±1.0%, the radii of the circles over each point adequately covering the errors. The squares of the correlation coefficients are presented for each fit in Table 1. (b) Capacitance predominant at high frequency (C1, pF) and low frequency (C1, µF) as a function of ammonia concentration. Each data point reported is an average of at least 3 readings to ensure repeatability. The experimental data was well within the error limit of ±1.0%, the radii of the circles over each point adequately covering the errors. The squares of the correlation coefficients are presented for each fit in Table 1.