质量标准
97%:
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 ≥97.0% (HPLC)
CMC (H2O) ~ 18-20 mM (0.53%)
CMC (0.1 M NaCl) ~ 23.4 mM
聚合数量Aggregation Number (H2O) ~ 27-100
dn/dc (H2O) 0.1159 mL/g
alpha < 5% (HPLC)
辛醇octanol < 0.05% (HPLC)
pH (1% 溶液) 4-9
水溶性Solubility in water at 0-5°C 20%
电导系数Conductance (10% 溶液) < 500 μS
吸光度Absorbance(1% 去垢剂溶液):
340 nm < 0.05
280 nm < 0.1
260 nm < 0.1
225 nm < 0.2
98%,用于蛋白分析:
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
参考资料:
1. Lorber, B., Bishop, J. B. and DeLucas, L. J., Biochim. Biophys. Acta 1023, 254-265 (1990).
2. Chattopadhyay, A. and London, E., Anal. Biochem. 139, 408-412 (1984).
3. Womack, M. D., Kendall, D. A. and MacDonald, R. C., Biochim. Biophys. Acta 733, 210-215(1983). 4. Brown, G. M., Dubreuil, P., Ichhaporia, F. M. and Desnoyers, J. E., Canadian J. Chem. 48, 2525-2531 (1970).
4. Measurement obtained in collaboration with Professor Mark Foster (University of Akron) under an experimental services contract