质量标准:Q/(GH)SJ476-92
项目ltem 分析纯 化学纯
(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
氯化物及氯酸盐(以Cl计)Chloride and
chlotate,% ≤0.001 0.005
硫化合物(以SO4计)Sulfur compounds,% ≤0.002 0.005
氮化合物(N)Nitrogen compounds,% ≤0.005 0.005
磷酸盐(PO4)Phosphate,% ≤0.003 0.01
硅酸盐及氨沉淀物Silicate and substan-
ces precipitatde by ammonia solution,% ≤0.005 0.003
钙及镁(Ca+Mg)Calcium and magnesium,% ≤0.01 0.05
铁(Fe)Iron,% ≤0.0005 0.001
砷(As)Arsenic,% ≤0.00003 0.00003
重金属(以Pb计)Heavy metals,% ≤0.0003 0.0003
ACS级
项目名称 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%
磷酸盐(PO4)Phosphate ≤0.001%
二氧化硅(以SiO2计)Silica ≤0.005%
硫化合物(以SO4计)Sulfur compounds ≤0.004%
重金属(以Pb计)Heavy metals ≤5ppm
铁(Fe)Iron ≤5ppm
钙(Ca)Calcium ≤0.005%
镁(Mg)Magnesium ≤0.002%
钠(Na)Sodium ≤0.02%