质量标准: GB/T1275-94
项目ltem 分析纯 化学纯
(AR) (CP)
含量Assay,% ≥99.5 99
pH(50g/L溶液,25℃)pH of water solution 3.0~3.5 3.0~3.5
澄清度试验Clarity 合格 合格
水不溶物lnsoluble matter in water,% ≤0.005 0.01
氯化物(Cl)Chloride,% ≤0.0005 0.004
铵盐(NH4)Ammonium salt,% ≤0.005 0.01
砷(As)Arsenic,% ≤0.00005 0.0001
钠(Na)Sodium,% ≤0.02 0.05
铁(Fe)Iron ,% ≤0.001 0.002
重金属(以Pb计)Heavy metals,% ≤0.0005 0.002
项目名称 ACS Grade
含量[ALK(SO4)2)•12H2O]Assay 98.0-102.0%
水不溶物Insoluble matter ≤0.005%
铵盐(NH4)Ammonium ≤0.005%
重金属(以Pb计)Heavy metals(as Pb) ≤0.001%
铁(Fe)Iron ≤0.001%
钠(Na)Sodium ≤0.02%