质量标准
AR:≥98.0% 外观Appearance 白色结晶粉末纯度Purity ≥98.0% (HPLC) 熔点Melting point 147°C - 152°C比旋光度Specific rotation [a]20/D +19.0 ~ +21.0 °(c=10, H2O) 水分Water <0.2 % (K.F.) 重金属Heavy metals (as Pb) <10 ppm 硫酸盐Sulfated ash <0.1 % 氯化物(Cl)Chloride < 50 PPM 品级Grade 超纯级 (Ultrapure) 外观Appearance 白色粉末红外光谱鉴别Infrared spectrometry Conforms纯度Purity ≥99.0% (GC) 熔点Melting point 150°C - 158°C 水溶解试验solubility in water soluble1 M ,20 °C, 无色透明水分water ≤3%(K.F)比旋光度Specific rotation [a]20/D +20.0±1°(c=10, H2O)灼烧残渣Residue on ignition ≤ 0.2% 不溶物Insoluble Matter ≤ 0.1% 干燥损失loss on drying ≤0.2% , 110 °C pH 4.0-6.0 (25 °C, 1 M in H2O) 痕量阴离子anion traces by ICP Atomic emission chloride (Cl-): ≤0.005% sulfate (SO42-): ≤0.005% 痕量阳离子cation traces by ICP Atomic emission Al: ≤0.0005% As: ≤0.00001% Ba: ≤0.0005% Bi: ≤0.0005% Ca: ≤0.001% Cd: ≤0.0005% Co: ≤0.0005% Cr: ≤0.0005% Cu: ≤0.0005% Fe: ≤0.0005% K: ≤0.005% Li: ≤0.0005% Mg: ≤0.0005% Mn: ≤0.0005% Mo: ≤0.0005% Na: ≤0.005% Ni: ≤0.0005% Pb: ≤0.0005% Sr: ≤0.0005% Zn: ≤0.0005% λ 1 M in H2O 紫外吸收UV absorption λ: 260 nm A: ≤0.05 λ: 280 nm A: ≤0.05