质量标准
外观Appearance 白色结晶粉末
红外光谱鉴定Infrared spectrometry 和对照品匹配
纯度Purity ≥98.0% (HPLC)
mol wt micellar avg mol wt 25,000
聚合数量aggregation number 84
磷Phosphorus (P) ≤0.005%
不溶物Insoluble matter ≤0.1%
灼烧残渣Residue on ignition ≤0.2%
CMC 20-25 mM(20-25°C)
transition temp cloud point >100 °C
比旋光度Specific rotation [a]20/D -23.0°~ -30.0°(C=1, Methanol)
氯chloride (Cl-): ≤0.05%
硫酸根sulfate (SO42-): ≤0.05%
Al: ≤0.0005%
Ca: ≤0.003%
Cu: ≤0.0005%
Fe: ≤0.0005%
K: ≤0.005%
Mg: ≤0.0005%
NH4+: ≤0.1%
Na: ≤0.1%
Pb: ≤0.001%
Zn: ≤0.0005%
蛋白分析试验protein-analysis test pass