目的 研究丹参药材中的丹参酮Ⅱ_A受热含量降低的变化规律。方法 采用化学动力学法,并采用 HPL C法测定丹参在 70℃,80℃,90℃,10 0℃四个温度加热不同时间丹参酮 A 含量。结果 丹参酮 A 的含量 (lg C)与加热时间 (t)呈直线关系,K70℃ =2 .3789× 10 ^-3h^-1,K80℃ =7.2 176× 10 ^-3h^-1,K90℃ =2 .0 6 0 4 9× 10 ^-2h^-1,K100℃ =5 .6 2 85× 10 ^-2h^-1 。结论 丹参酮 A的分解属一级反应,lgK =14 .386 4 - 5 834.316 7/ T,t^{2 5℃}_{0 .9}=1.9年

Object To study the regularity of lowering the heated contents of tanshinone Ⅱ_A in the root of Salvia Miltiorrhiza Bge. Methods Using the Methods of chemical kinetics, the drugs were heated for different time at 70 ℃, 80 ℃, 90 ℃, 100 ℃. The contents of tanshinone Ⅱ A were determined by HPLC. Results The contents of tanshinone Ⅱ A (lgC) with heating time (t) were shown in linear correlation, K 70 ℃ = 2 378 9 ×10 ^-3 h^-1, K 80 ℃ = 7 217 6 ×10 ^-3 h^-1, K 90 ℃ = 2 060 49 ×10 ^-2 h^-1, K 100 ℃ = 5 628 5 ×10 ^-2 h^-1 . Conclusion The decomposition reaction of tanshinone Ⅱ A is a first grade kinetics reaction. lgK= 14 386 4- 5 834 316 7 /T, t ^{25 ℃} _0.9 =1 9 year.