The texture of the purple sweet potatoes will be measured as followed by the proposed method of Silva et al. (2014). The texture of fresh and osmotically dehydrated samples will be determined by evaluating the stress at rupture in using a texture analyzer (TA-XT2i Texture analyzer, UK). The method will be used to measure the force in compression at the moment of rupture. This uniaxial compression test will be carried out at a compression speed of 5 mm/s and 60% sample deformation. The stress at failure will be determined from the peak of the stress-strain curve.