Fig. 9. The SPR peaks of e-TiO2-NPs suspensions (1% w/w) without or with the presence of the food matrix during each phase of in vitro digestion. The lower-case (a–c) and capital (A–C) letters indicate significant differences between the digestive step in the absence and presence of the food matrix (P < 0.05). * indicates significant differences between the absence and presence of the food matrix for each phase of digestion (*P < 0.05 and **P < 0.01).
