Quality Standard: GB/T 694-81
項(xiàng)目Item 優(yōu)級(jí)純 分析純 化學(xué)純
(GR) (AR) (CP)
含量(CH3COONa)Assay,% ≥99.0 99.0 98.5
pH(50g/L,25℃)pH of water solution 7.5-9.0 7.5-9.0 7.5-9.0
澄清度試驗(yàn)Clarity 合格 合格 合格
水不溶物Insoluble matter in water,% ≤0.005 0.005 0.01
氯化物(Cl)Chloride,% ≤0.001 0.002 0.005
硫酸鹽(SO4)Sulfate,% ≤0.003 0.003 0.001
磷酸鹽(PO4)Phosphate,% ≤0.0005 0.0005 0.001
鎂(Mg)Magnesium,% ≤0.0005 0.0005 0.001
鋁(Al)Aluminum,% ≤0.001 0.001 0.002
鈣(Ca)Calcium,% ≤0.001 -- --
鐵(Fe)Iron,% ≤0.0005 0.0005 0.001
重金屬(以Pb計(jì))Heavy metals,% ≤0.001 0.001 0.002
ACS級(jí)
項(xiàng)目名稱 ACS Grade
含量Assay ≥99.0%
pH(5%,25.0℃)pH of a 5%
solution at 25.0℃ ≥7.0-9.2
不溶物Insoluble matter ≤0.01%
干燥失重Loss on drying ≤1.0%
氯化物(Cl)Chloride ≤0.002%
磷酸鹽(PO4)Phosphate ≤0.001%
硫酸鹽(SO4)Sulfate ≤0.003%
鈣(Ca)Calcium ≤0.005%
鎂(Mg)Magnesium ≤0.002%
重金屬(以Pb計(jì))Heavy metals ≤0.001%
鐵(Fe)Iron ≤0.001%