质量标准
外观Appearance 淡黄色至琥珀色透明粘稠液体
红外光谱鉴定Infrared spectrometry 和对照品匹配
pH(5%水溶液) 4 - 7 (5% in water)
灼烧残渣Residue on ignition (Ash) ≤1.0 %
氯Chloride ≤0.05 %
硫酸盐Sulfate ≤0.6 %
铝Aluminum (Al) ≤0.0005 %
磷Phosphorus (P) ≤0.0005 %
铅Lead (Pb) ≤0.001 %
铁Iron (Fe) ≤0.001 %
铜Copper (Cu) ≤0.0005 %
锌Zinc (Zn) ≤0.0005 %
钙Calcium (Ca) ≤0.0005 %
镁Magnesium (Mg) ≤0.0005 %
钠Sodium (Na) ≤0.5 %
钾Potassium (K) ≤0.005 %
铵盐Ammonia (NH4) ≤0.05 %