Items 檢測項(xiàng)目 Standard 檢測標(biāo)準(zhǔn) Appearance 外觀 Off-White powder and particles 類白色粉末和顆粒 Assay 含量 Not less than 60% 不低于60% Iron(Fe) 鐵 Not more than 10ppm 不超過 10ppm Loss on Drying 干燥失重 Not more than 10% 不超過 10% Residue on ignition (sulfated) 灼燒殘渣 Not more than 0.50% 不超過 0.50% Heavy metal(Pb) 重金屬(鉛) Not more than 20ppm 不超過 20ppm (S) 硫 Not more than 0.05% 不超過0.05%