Identification Method of an Electrolytic Solution Based on Principal Component Analysis of Diffusion Curve Regression Parameter

Abstract

Measure of concentration based on conductivity meter is necessary to investigate the kind. It is desired to indicate the concentration and kind of solution at the same time. Then new measurement method for electrolytic solution was studied. The feature of fundamental concept of the method of this measurement is to record Q-variation of the printed coil sensor continuously by a Q-meter during trasmission and diffusion of a solution into pure water through the cellophane transmission membrane. Three items of the method were studied. Improvements were made on measurement cell for removing the air bubble and on model formula for regression of Q-variation. And the results of principal component analysis for regression parameters were applied to identification. Four kinds, four concentrations of electrolytic selected on solutions were measured and analyzed. As the result of principal component analysis, it was found that two principal components represented original parameters. Therefore the efficiency of principal component analysis for this measurement and possibility of identification were indicated.