Hi! I'm a high school student, so please bear with me if I spout incoherent nonsense.
I wanted to look at the effectiveness of TiO2 in sunscreen by measuring its absorbance using a UV/Vis Spectrometer. My plan was to make a solution and measure the absorbance before and after exposure to UV light. Looking online, I've read that TiO2 is insoluble in water, and instead I could use concentrated HCl or heated H2SO4. Would that pose an issue when recording the absorbance?