AR 4N GR
Q/(HG)SJ 017-91
项目Item 优级纯 分析纯 化学纯
(GR) (AR) (CP)
铵盐(NH4)Ammonium,% ≤0.0002 0.0005 0.0001
磷酸盐(PO4)Phosphate,% ≤0.0005 0.0005 0.001
钙(Ca)Calcium,% ≤0.0005 0.0005 0.002
镁(Mg)Magnesium,% ≤0.0005 0.0005 0.001
铁(Fe)Iron,% ≤0.0001 0.00025 0.0005
砷(As)Arsenic,% ≤0.00005 0.0001 0.0001
重金属(以Pb计)Heavy metals,% ≤0.0003 0.0005 0.001
pH(50g/L溶液)pH of 5.0-8.0 5.0-8.0 5.0-8.0
water solution
澄清度试验Clarity 合格 合格 合格
水不溶物lnsoluble matter
in water,% ≤0.002 0.005 0.01
氯化物(Cl)Chloride,% ≤0.0005 0.001 0.002
硝酸盐(NO3)Nitrate,% ≤0.001 0.001 0.003
ACS级
项目名称 ACS Grade
含量(Na2SO4·10H2O)Assay ≥99.0%
重金属(以Pb计)Heavy metals ≤3ppm
铁(Fe)Iron ≤5ppm
钙(Ca)Calcium ≤0.005%
镁(Mg)Magnesium ≤0.003%
钾(K)Potassium ≤0.005%
pH(5%溶液,25.0℃)
pH of a 5% solution at 25.0℃ 5.2-9.2
水不溶物Insoluble matter ≤0.001%
氯化物(Cl)Chloride ≤5ppm
磷酸盐(PO4)Phosphate ≤5ppm