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项目ltem 分析纯 化学纯
(AR) (CP)
含量[Ca(OH)2]Assay,% ≥95.0 93.0
盐酸不溶物Insoluble in hydrochl-oride acid,% ≤0.05 0.1
氨水中沉淀物Substances precipita-
ted from ammonia solution,% ≤0.25 0.5
氯化物(Cl)Chloride,% ≤0.01 0.02
硫化合物(SO4)Sulfur compounds,% ≤0.2 0.3
铁(Fe)lron,% ≤0.01 0.02
镁盐及碱金属(以MgO计)Mafnesium
and alkali metals,% ≤0.5 0.75
重金属(以Pb计)Heavy metals,% ≤0.002 0.003
GB 6852-86
项目ltem 基准试剂
(PT)
pH(饱和溶液)25℃ pH of saturated
solution ≥98.0
含量[Ca(OH)2]Assay,%
澄清度试验Clarity 合格
盐酸不溶物Insoluble in hydrochl-
oride acid,% ≤0.03
氯化物(Cl)Chloride,% ≤0.005
硫化合物(SO4)Sulfur compounds,% ≤0.005
碳酸盐(以CaCO3计)Carbonate,% ≤1.0
铁(Fe)lron,% ≤0.001
镁及碱金属(以硫酸盐计)Mafnesium
and alkali metals,% ≤0.2
重金属(以Pb计)Heavy metals,% ≤0.002
ACS级
项目名称Item ACS Grade
含量[Ca(OH)2]Assay ≥95%
含量[CaCO3]Assay ≤3.0%
稀盐酸不溶物Insoluble in dilute hydrochloric acid ≤0.03%
氯化物(Cl)Chloride(Cl) ≤0.03%
含硫化合物(以SO4计)Sulfur compounds ≤0.1%
重金属(以Pb计)Heavy metals(as Pb) ≤0.003%
铁(Fe)Iron(Fe) ≤0.05%
镁(Mg)Magnesium(Mg) ≤0.5%
钾(K)Potassium(K) ≤0.05%
钠(Na)Sodium(Na) ≤0.05%
锶(Sr)Strontium(Sr) ≤0.05% |
