香蜂草乾燥之基礎研究

本研究首先探討香蜂草最合適乾燥層厚度，並獲致其最佳值為6cm，當以此厚度使用烤箱熱風與吸附除濕進行香蜂草乾燥基礎試驗，兩種乾燥方式溫度設定，分別為烤箱熱風40、50與60℃三溫階與吸附除濕20、30、35與40℃四溫階，試驗結果顯示40℃為烤箱熱風乾燥乾品在品質判定下之最佳乾燥溫度，而35℃則為吸附除濕乾燥乾品在考量品質與單位時間產量下之最佳乾燥溫度。兩溫度所獲致乾品物理品質之乾品磨粉色澤、茶湯水色與重量復水率量測結果，各有優勢之表現。當進一步以ANOVA變異數分析其品質指標，結果顯示僅乾品磨粉色澤無顯著差異外，其餘之兩品質指標則皆有顯著差異，茶湯水色以烤箱熱風乾燥者佳，但重量復水率則以吸附除濕乾燥者佳。本研究亦獲致Newton模式對香蜂草乾燥之乾基含水率變化，具有良好之迴歸適稱性，可作為香蜂草乾燥之預測方程式。

關鍵字

香蜂草；乾燥；乾品品質

並列摘要

In this research, an appropriate thickness of drying layers for lemon balm was first investigated, and the best thickness obtained was 6 cm. Based on the best thickness of drying layers, the fundamental drying tests of lemon balm using the hot-air drying and the desiccant dehumidification drying, respectively, were performed. The temperatures for the hot-air drying were 40, 50, and 60℃, whereas 20, 30, 35 and 40℃ for the desiccant dehumidification drying. The experimental results showed that the optimum drying temperature obtained for the hot-air drying on the evaluation of the drying products quality was 40℃ and which was 35℃ for the desiccant dehumidification drying as the quality and the production rate considered. The physical quality indices such as the white index of the samples powder and tea water, and the weight dehydration rate of lemon balm curing form these two temperatures were also evaluated, and both methods displayed different advantages on the above qualities. The statistical values obtained by using the ANOVA analysis gave that on both methods, the white index of the sample powder showed no significant differences, the white index of the sample tea water of the hot-air drying was superior, and the weight dehydration rate of the desiccant dehumidification drying was better. This research also demonstrated that Newton's model had the characteristics of the goodness-of-fit to predict the moisture content changes of lemon balm, and could be used as its predication equation.

並列關鍵字

Lemon balm ； Drying ； Quality of drying products

國際替代計量

香蜂草乾燥之基礎研究

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