... power, large scattering coefficient. Quality Standard anataseItemIndexTiO2 content,%(m/m)≥98.5Whiteness(compared with first class standard sample listed in ... sample listed in GB1706-93)≥105Volatile matters at105·C,%(m/m)≤0.5PH value of water suspension6.8-8.0Oil ... 20Residue on the sieve(45um mesh),%(m/m)≤0.05Electrical resistance of aqueous extract,Ωm≥22Water dispersible power,%≥80Iron content,ppm ...