質(zhì)量標(biāo)準(zhǔn): HG/T 3-1101-77
項(xiàng)目Item 分析純 化學(xué)純
(AR) (CP)
含量(C4H4Na2O6·2H2O)Assay,% ≥99.0 98.0
水溶液反應(yīng)Water solution reaction 合格 合格
澄清度試驗(yàn)Clarty 合格 合格
水不溶物Insiluble matter in water,% ≤0.005 0.01
氯化物(Cl)Chloride,% ≤0.002 0.005
硫酸鹽(SO4)Sulfate ,% ≤0.005 0.01
磷酸鹽(PO4)Phosphate,% ≤0.002 --
鐵(Fe)Iron,% ≤0.002 0.005
重金屬(以Pb計(jì))Heavy metals,% ≤0.0005 0.001
ACS級(jí)
項(xiàng)目名稱 ACS Grade
含量(C4H4Na2O6·2H2O)Assay 99.0-101.0%
干燥失重Loss on drying 15.61%-15.71%
pH(5%溶液,25.0℃)pH of a 5% solution at 25.0℃ 7.0-9.0
水不溶物Insoluble matter ≤0.005%
氯化物(Cl)Chloride ≤5ppm
磷酸鹽(PO4)Phosphate ≤5ppm
硫酸鹽(SO4)Sulfate ≤0.005%
銨(NH4)Ammonium ≤0.03%
鈣(Ca)Calcium ≤0.01%
重金屬(以Pb計(jì))Heavy metals ≤5ppm
鐵(Fe)Iron ≤0.001%