Optical pH Sensor Based on Immobilization Anthocyanin from L. onto Polyelectrolyte Complex Pectin-Chitosan Membrane for a Determination Method of Salivary pH.

A simple optical pH sensor based on immobilization, L. anthocyanin methanol extract, onto a pectin-chitosan polyelectrolyte complex (pectin-chitosan PEC), has been successfully fabricated. The optical pH sensor was manufactured as a membrane made of pectin-chitosan PEC and the extracted anthocyanin.