摘要
用pH电势法研究不同甘草酸铵浓度和不同温度时甘草酸铵对抗坏血酸与铅配合能力的影响。在生理条件下，甘草酸铵的浓度为5．0×10-4mol／L时，抗坏血酸与铅配合稳定带数为lgk1＝8．72，lgk2＝6．91。结果表明，随温度降低和甘草酸铵浓度增大，配合稳定常数增大。
Stability constant of ascorbic acid a nd lea d complex was measured by pH potentiometry at different tempcraturcs and concentrations of monoammonium glycyrrhizinate (MG ).At a concentration of 5.0×10-4mol/L and at biolugical condition, lgk1 = 8.72 and lgk2 =6.91. The result suggestod that the stability constant can be imptoved at decreased temperatures and increased concentrations of MG.
出处
《中草药》
CAS
CSCD
北大核心
1995年第11期574-575,共2页
Chinese Traditional and Herbal Drugs
