Abstract
A new method to measure concentration spectra is developed. The electric current between electrodes is proved proportional to the integral function of the Fourier transform of concentration. Concentration spectrum is obtained by integrating varying frequency of the electric current. The specific feature of this method is that it does not use any wave filter. High selectivity of frequency and ease of analyzing low frequency components of the spectrum are advantages of this method. The method is, however, easily affected by noise, and a means of avoiding this defect is developed.
