研究厚朴炮制前后挥发油的变化。结果表明：总含量降低，炒黄与姜炙厚朴相似，降低26％，炒焦降低42％；而其化学成分未发生明显变化，气相色谱图基本一致。实验发现挥发油中含有发汗、祛痰、平喘的成分。 Study the change of volatile oils before and after processing by Houpu. The results showed that the total content was reduced, the fried yellow was similar to the ginger glutinous rice husk, reduced by 26%, and the fried coke was reduced by 42%; while the chemical composition did not change significantly, and the gas chromatograms were basically the same. The experiment found that volatile oil contains sweat, sputum, and asthma.