Development of a novel method for detecting the integrity of aseptic paperboard laminate packages containing aluminium foil

A method was developed to determine the integrity of aseptic paperboard laminate packages containing aluminium foil using the cyclic voltammetric method. The ability of the method to identify pinholes arising from cracks in the plastic inner layer was demonstrated. When a cyclic voltammetric method was applied, a peak current was observed when the voltage greater than 0.6 V due to the chemical reaction at the exposed aluminium layer. Moreover, in packages with penetrating pinholes, the pinholes formed an ion channel which allowed ions to flow out of the package. This study demonstrates that cyclic voltammetry is applicable to distinguish between the defects of aseptic paperboard laminate packages containing aluminium foil.