质量标准: HG/T 3-1465-82
项目Item 分析纯 化学纯
(AR) (CP)
含量(C6H4O7N2)Assay,% ≥99.0 98.0
澄清度试验Clarity 合格 合格
水不溶物Insoluble matter in water,% ≤0.005 0.01
灼烧残渣(以硫酸盐计)Ignition residue,% ≤0.03 0.06
氯化物(Cl)Chloride,% ≤0.001 0.002
硫化合物(以SO4计)Sulfur compounds,% ≤0.005 0.01
磷化合物(以PO4计)Phosphours compounds,% ≤0.002 0.005
草酸盐(C2O4)Oxalate 合格 --
钙(Ca)Calcium,% ≤0.005 0.02
铁(Fe)Iron,% ≤0.0005 0.002
重金属(以Pb计)Heavy metals,% ≤0.0005 0.001
项目名称Item ACS Grade
含量[((NH4)2HC6H5O7)]Assay 98.0-103.0%
水不溶物Insoluble matter ≤0.005%
灼烧残渣Residue after ignition ≤0.005%
氯化物(Cl)Chloride(Cl) ≤0.0001%
重金属(以Pb计)Heavy metals(as Pb) ≤0.00005%
铁(Fe)Iron(Fe) ≤0.00002%
草酸盐(C2O4)Oxalate Passes test
磷酸盐(PO4)Phosphate ≤5ppm
硫化合物(以SO4计)Sulfur compounds ≤0.005%