Voltammetric determination of ITX in hydro-alcoholic solutions and wine

An electrochemical method to detect the Isopropyl-9H-thioxanthen-9-one (ITX), a sulfur-type photo-initiator widely used in UV-curing techniques to promote the polymerization of inks, in a hydro-alcoholic solution, has been developed and tested in a commercial wine sample. The experimental parameters of electroanalytical techniques, mainly differential pulse voltammetry (DPV), as well as the alcohol/water ratio have been optimized to improve the sensitivity and to lower the minimum detectable value. The proposed analytical method has been tested on real samples of commercial wine finding out a decision limit of 2.3 × 10−7 M and a minimum detectable value of 4.5 × 10−7 M.