磷酸二氢钾分析纯

GB/T1274-93
项目ltem 分析纯 化学纯
(AR) (CP)
含量(KH2PO4),% ≥99.5 99.0
pH(50g/L,25℃)pH of water solution 4.2～4.5 4.2～4.5
澄清度试验Clarity 合格　　　 合格
水不溶物lnsoluble matter in water,% ≤0.002 0.005
干燥失重Drying loss,% ≤0.2 0.3
氯化物(Cl)Chloride,% ≤0.001 0.005
硫酸盐(SO4)Sulfale,% ≤0.003 0.005
总氮量(N)Total nitrogen,% ≤0.001 0.002
砷(As)Arsenic,% ≤0.0005 0.002
钠(Na)Sodium,% ≤0.02 0.05
铁(Fe)Iron,% ≤0.001 0.005
重金属(以Pb计)Heavy metals,% ≤0.001 0.005

ACS级
项目名称　 ACS Grade
含量(KH2PO4)Assay ≥99.0%
pH(5%溶液,25.0℃)
pH of a 5% solution at 25.0℃ 4.4-4.5
水不溶物Insoluble matter ≤0.01%
干燥失重Loss on drying ≤0.2%
氯化物(Cl)Chloride ≤0.001%
硫酸盐(SO4)Sulfate ≤0.003%
重金属(以Pb计)Heavy metals(as Pb) ≤0.001%
铁(Fe)Iron ≤0.002%
钠(Na)Sodium ≤0.005%