GB/T 6685-86
项目Item 优级纯 分析纯
(GR) (AR)
含量(NH2OH.HCl)Assay,% ≥ 99.0 98.5
水溶液反应Water solution reaction 合格 合格
澄清度试验Clarity 合格 合格
灼烧残渣(以硫酸盐计)Ignition residue,% ≥ 0.01 0.01
硫酸盐(SO4)Sulfate,% ≥ 0.002 0.002
铵盐(NH4) Ammonium,% ≥ 0.1 0.1
铁(Fe)Iron,% ≥ 0.0003 0.0003
砷(As)Arsenic,% ≥ 0.0005 --
重金属(以Pb计)Heavy metals,% ≥ 0.0003 0.0003
ACS级
项目名称 ACS Grade
含量(NH2OH·HCl)Assay ≥96.0%
乙醇溶解试验Solubility in alcohol Passes test
灼烧残渣Residue after ignition ≤0.05%
可滴定酸Titrable acid ≤0.25meq/g
铵(NH4)Ammonium Passes test
硫酸盐
和亚硫酸盐(SO4)Sulfate and sulfite ≤0.005%
铁(Fe)Iron(Fe) ≤5ppm
重金属(以Pb计)Heavy metals(as Pb) ≤5ppm
99.99% metals basis:
外观Appearance White Crystals
红外光谱Infrared spectrum Conforms to Structure
滴定纯度红外光谱鉴别Infrared spectrometry Conforms to Structure
纯度Purity ≥99.99% Based on Trace Metals Impurities
纯度Purity by Titration by KMNO4 98.5 - 101.5 %
灼烧残渣Residue on Ignition ≤0.05 %
溶液澄清度Clarity of Solution Pass
铁Iron (Fe) ≤5 ppm
重金属Heavy Metal (as Lead) ≤5 ppm
铵盐Ammonium Pass
硫化物Sulfur compounds ≤0.005 %
可滴定酸Titratable acid ≤0.25 MEQ/g
痕量金属分析Trace Metal Analysis ≤100.0 ppm by ICP Atomic emission
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