红外光谱测定Infrared spectrometry authentic
含量Assay Total base >99.0 %
光度测量Spectrophotometry 98.0-102.0 % (λ max. 275 nm, pH 1)
摩尔吸收率molar absorptivity10400 +/- 2%, on dry basis
重金属Heavy metals (as Pb) <10 ppm
硫酸盐灰分Sulfated ash <0.1 % (800°C)
氮Nitrogen (N) 37.06-38.58 % (on dry basis)
干燥损失Loss on drying <0.5 % (105°C, 5 小时)
吸光率Ratio of Absorbances 0.46 to 0.5 (A250/A260)
1.47 to 1.53 (A280/A260)