Noise, due to the random motion of the ions in the electrolyte alters the original signal. Here, we have used the analytical model, as a reference, to filter out the noise much better as compared to the moving mean, Savitzky-Golay and traditional Fast-Fourier filtering. The simulated signal (SS) is subtracted from the noisy signal (NS) [Fig. ] to be assumed as the noise which is filtered from the NS. The filtered noise is compared with the noise extracted [Fig. ] from the next iteration with a different SS and the same NS. The extracted signal from the NS agrees with the simulated data even when the SNR is 10dB (Fig. ). The maximum power spectral density of the extracted noise (threshold) [Fig. ] decreases with the increase in SNR of the NS (measured) which is different for every oligopeptide combination.