Quality Standard: 项目Item 分析纯
(AR)
含量(CaHPO4·2H2O)Assay,% ≥ 99.0
盐酸不溶物lnsoluble in hydrochloric acid,% ≤ 0.005
灼烧失重Ignition residue,% 24~26
氯化物(Cl)Chloride,% ≤ 0.005
硫酸盐(SO4)Sulfate,% ≤ 0.02
硝酸盐(NO3)Nitrate 合格
氨(NH3)Ammonia,% ≤ 0.01
镁(Mg)Magnesium,% ≤ 0.02
铁(Fe)Iron,% ≤ 0.0015
重金属(以Pb计)Heavy metals,% ≤ 0.001
砷(As)Arsenic,% ≤ 0.001
品级Grade 药用级
(Ph. Eur., BP, USP)
含量assay 98-102.5%
重金属heavy metals (as Pb) ≤0.003%
盐酸不溶物insoluble in HCl ≤0.1%
灼烧损失loss on ignition 24.5-26.5% , 800 °C
氯chloride (Cl-): ≤200 ppm
氟fluoride (F-): ≤40 ppm
硫酸盐sulfate (SO42-): ≤3000 ppm
砷As: ≤1 ppm
钡Ba:, in accordance (Ph Eur)
钡Ba:, in accordance (USP)
铁Fe: ≤300 ppm