To understand the drying and storage behaviors of industrial hemp flower and leaf, their sorption isotherms must be determined. This study aims to determine the moisture sorption isotherms, fitting mathematical models, and predicting the shelf-life of samples with different mass ratios of powdered hemp flower/leaf at different temperatures. The sorption isotherms of powdered hemp flower to leaf ratios (1:0, 0.75:0.25, 0.5:0.5, 0.25:0.75, 0:1) were determined and shelf-life predicted at different temperatures (20, 30, 40, 50, and 60 °C) using a vapor sorption analyzer; afterward, the adsorption and desorption equilibrium moisture contents (EMC) of different ratios of powdered hemp flower to leaf were modeled using six common empirical models. Both adsorption and desorption EMC of all ratios of powdered hemp flower to leaf decreased as temperature increased. Furthermore, shelf-life of the powdered hemp samples decreases as temperature increases. Modified Halsey and Henderson equations were the best models for the hemp sample isotherms.

要了解工业大麻花和叶的干燥和储存行为，必须确定它们的吸附等温线。本研究旨在确定不同质量麻花/叶粉质量比样品在不同温度下的吸湿等温线、拟合数学模型和预测保质期。确定了粉末大麻花叶比（1：0、0.75：0.25、0.5：0.5、0.25：0.75、0：1）的吸附等温线，并预测了不同温度（20、30、40、50、和 60 °C) 使用蒸汽吸附分析仪；然后，使用六种常见的经验模型对不同比例的粉末大麻花叶的吸附和解吸平衡水分含量（EMC）进行了建模。随着温度的升高，所有粉末大麻花叶比例的吸附和解吸EMC均降低。此外，粉末大麻样品的保质期随着温度的升高而降低。修正的 Halsey 和 Henderson 方程是大麻样品等温线的最佳模型。