薄荷饮片在贮存中挥发油散失。本实验应用化学动力学方法研究薄荷饮片露置在空间,挥发油散失的动力学规律。实验结果表明:其散失规律符合一级反应。25℃时,半衰期为66天;20℃时为134天。 Peppermint cut pieces lose their volatile oil during storage. In this experiment, chemical dynamics method was used to study the dynamics of the volatile oil loss in the presence of peppermint slices exposed in space. The experimental results show that the law of its dissipation conforms to the first-order reaction. At 25°C, the half-life is 66 days; at 20°C it is 134 days.