D. Determination
Transfer 3.0 mL test solution to 5 mL glass-stopper graduate (or volumetric flask), dilute to volume with H2SO4 (1+9), and continue as is C, beginning “ add 0.2 mL 30% H2O2,…”.
Determine mg TiO2 in test solution from standard curve, and calculate as percent TiO2.