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自河北安国所购木香等五种药材的挥发油含量进行了测定，并与文献中报道的其他地区的同种或不同品种的同类药材进行了比较，以辨质量优劣，为今后购药择地提供参考。
The volatile oil content of five kinds of medicinal materials such as woody incense purchased from Hebei Anguo was measured and compared with the same or different types of similar medicinal materials reported in the literature in other regions to discriminate the quality of the medicines for future purchases. Provide reference.