質(zhì)量標(biāo)準(zhǔn): HG/T 3-1064-84
項(xiàng)目Item 分析純 化學(xué)純
(AR) (CP)
含量[NH4H2PO4]Assay,% ≥99.0 98.5
水溶液反應(yīng)Solution reaction 合格 合格
澄清度試驗(yàn)Clarity 合格 合格
水不溶物Insoluble matter in water,% ≤0.005 0.01
氯化物(Cl)Chloride,% ≤0.0005 0.001
硫化合物(以SO4計(jì))Sulfur compounds ≤0.005 0.01
硝酸鹽(NO3)Nitrate,% ≤0.001 0.002
鐵(Fe)Iron,% ≤0.001 0.003
砷(As),Arsenic,% ≤0.0005 0.002
重金屬(以Pb計(jì))Heavy metals,% ≤0.0005 0.001
堿金屬(以磷酸鹽計(jì))Alkali metals,% ≤0.2 0.3
ACS級(jí)
項(xiàng)目名稱Item ACS Grade
含量NH4H2PO4Assay ≥98.0%
pH(5%溶液,25.0℃)pH 3.8-4.4
水不溶物Insoluble matter ≤0.005%
氯化物(Cl)Chloride(Cl) ≤5ppm
硝酸鹽(NO3)Nitrate ≤0.001%
硫酸鹽(SO4)Sulfate ≤0.01%
重金屬(以Pb計(jì))Heavy metals(as Pb) ≤5ppm
鐵(Fe)Iron(Fe) ≤0.001%
鈣(Ca)Calcium(Ca) ≤0.001%
鎂(Mg)Magnesium(Mg) ≤5ppm
鉀(K)Potassium(K) ≤0.005%
鈉(Na)Sodium(Na) ≤0.005%