Carvacrol release in the films. Relative cumulative release profiles were measured by monitoring the carvacrol release from the polymeric films at 23 ± 1 ºC and 95 ± 3 % RH (simulating the exposure to fresh food). A piece sample of film was placed on a desorption tube where a humid 15 mL/min stream of He hauled the released product to a gas chromatograph. The carvacrol release flow was determined using a HP5890 gas chromatograph with a 200-µL automatic injection valve and a HP5 column of 30 m, 320 µm of diameter and 0.25 µm of thickness. Thermal conditions were: 80 ºC at the injection valve, 200 ºC at the injection port, 220 ºC at the flame ionization detector, and 100 °C at the column oven. Film samples were exposed to high humidity conditions with a He stream that.