質(zhì)量標(biāo)準(zhǔn):Q/(GH)SJ476-92
項(xiàng)目ltem 分析純 化學(xué)純
(AR) (CP)
含量(K2CO3?3/2H2O)Assay,% 99.0~100.2 98.0~100.5
水不溶物lnsoluble matter in water,% ≤0.005 0.02
氯化物及氯酸鹽(以Cl計(jì))Chloride and
chlotate,% ≤0.001 0.005
硫化合物(以SO4計(jì))Sulfur compounds,% ≤0.002 0.005
氮化合物(N)Nitrogen compounds,% ≤0.005 0.005
磷酸鹽(PO4)Phosphate,% ≤0.003 0.01
硅酸鹽及氨沉淀物Silicate and substan-
ces precipitatde by ammonia solution,% ≤0.005 0.003
鈣及鎂(Ca+Mg)Calcium and magnesium,% ≤0.01 0.05
鐵(Fe)Iron,% ≤0.0005 0.001
砷(As)Arsenic,% ≤0.00003 0.00003
重金屬(以Pb計(jì))Heavy metals,% ≤0.0003 0.0003
ACS級(jí)
項(xiàng)目名稱 ACS Grade
含量(K2CO3?3/2H2O)Assay 98.5-101.0%
干燥失重(285℃)Loss on heating at 285℃ 14.0-16.5%
水不溶物 Insoluble matter ≤0.01%
氯化物(Cl)Chloride ≤0.003%
磷酸鹽(PO4)Phosphate ≤0.001%
二氧化硅(以SiO2計(jì))Silica ≤0.005%
硫化合物(以SO4計(jì))Sulfur compounds ≤0.004%
重金屬(以Pb計(jì))Heavy metals ≤5ppm
鐵(Fe)Iron ≤5ppm
鈣(Ca)Calcium ≤0.005%
鎂(Mg)Magnesium ≤0.002%
鈉(Na)Sodium ≤0.02%