Quality Standard: Q/(HG)SJ 017-91
項(xiàng)目Item 優(yōu)級純 分析純 化學(xué)純
(GR) (AR) (CP)
pH(50g/L溶液)pH of 5.0-8.0 5.0-8.0 5.0-8.0
water solution
澄清度試驗(yàn)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
硝酸鹽(NO3)Nitrate,% ≤0.001 0.001 0.003
銨鹽(NH4)Ammonium,% ≤0.0002 0.0005 0.0001
磷酸鹽(PO4)Phosphate,% ≤0.0005 0.0005 0.001
鈣(Ca)Calcium,% ≤0.0005 0.0005 0.002
鎂(Mg)Magnesium,% ≤0.0005 0.0005 0.001
鐵(Fe)Iron,% ≤0.0001 0.00025 0.0005
砷(As)Arsenic,% ≤0.00005 0.0001 0.0001
重金屬(以Pb計(jì))Heavy metals,% ≤0.0003 0.0005 0.001
ACS級
項(xiàng)目名稱 ACS Grade
含量(Na2SO4·10H2O)Assay ≥99.0%
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
磷酸鹽(PO4)Phosphate ≤5ppm
重金屬(以Pb計(jì))Heavy metals ≤3ppm
鐵(Fe)Iron ≤5ppm
鈣(Ca)Calcium ≤0.005%
鎂(Mg)Magnesium ≤0.003%
鉀(K)Potassium ≤0.005%