Determination of the botanical origin of starch using direct potentiometry and PCA

► The first application of direct potentiometry for the starch origin determination. ► The use of platinum redox electrode to measure decreases in the free triiodide ion after its complexation into a starch-triiodide complex. ► The use of principal components data analysis (PCA) for modeling the relationships between different electrochemical potential response data according to the starch type in starch-triiodide complex. ► The more convenient, simpler, easier and less expensive method for determination of botanical starch origin than the usualy used microscopic methods.