质量标准: GB/T 664-93
项目Item 分析纯 化学纯
(AR) (CP)
含量(FeSO4·7H2O)Assay,% 99.0-101.0 98.0-101.0
水不溶物Insoluble matter in water,% ≤0.005 0.02
氯化物(Cl)Chloride,% ≤0.002 0.005
总氮量(N)Total nitrogen,% ≤0.001 --
磷酸盐(PO4)Phosphate,% ≤0.0005 0.002
锰(Mn)Manganese,% ≤0.05 --
高铁(Fe3+)Ferric,% ≤0.02 0.10
铜(Cu)Copper,% ≤0.005 0.01
锌(Zn)Zinc,% ≤0.005 0.02
砷(As)Arsenic,% ≤0.00002 0.00005
铅(Pb)Lead,% ≤0.002 0.002
氨水不沉淀物Substances not
precipitated by ammonia,% ≤0.05 0.2
ACS级
项目名称Item ACS Grade
含量(FeSO4·7H2O)Assay ≥99.0%
水不溶物Insoluble matter in water ≤0.01%
氯化物(Cl)Chloride(Cl) ≤0.001%
磷酸盐(PO4)Phosphate ≤0.001%
钙(Ca)Calcium(Ca) ≤0.005%
铜(Cu)Copper(Cu) ≤0.005%
镁(Mg)Magnesium(Mg) ≤0.002%
锰(Mn)Manganese(Mn) ≤0.05%
钾(K)Potassium(K) ≤0.002%
钠(Na)Sodium(Na) ≤0.02%
锌(Zn)Zinc(Zn) ≤0.005%
高铁(Fe3+)Ferric ion ≤0.1%