Subcritical water extraction (SWE) of monoterpenes from coriander seeds and effect of extraction conditions were investigated varying temperature (170–200 °C) and time (5–20 min). Monoterpenes was influenced by differences in their chemical structures and SWE conditions. The extraction efficiency of linalool was decreased with the increasing extraction temperature and extraction time, whereas linalool oxide was increased due to conversion of linalool to linalool oxide by hydrothermal oxidation. Geraniol, which has the same chemical formula as linalool, was extracted at a high temperature (170 °C) owing to the different placement of hydroxyl groups. The efficiency of SWE for geraniol (1.22 ± 0.22 mg/g) and linalool oxide (0.30 ± 0.09 mg/g) was higher than that of conventional extraction methods (hexane, methanol, hot water, and hydrodistillation). Therefore, SWE can be used to effectively and selectively extract monoterpenes by exploiting temperature changes in short extraction time.

研究了不同温度（170-200 °C）和时间（5-20​​ 分钟）从芫荽籽中提取单萜的亚临界水萃取 (SWE) 和萃取条件的影响。单萜受其化学结构和 SWE 条件差异的影响。芳樟醇的提取效率随着提取温度和提取时间的增加而降低，而芳樟醇氧化物的提高是由于芳樟醇通过水热氧化转化为芳樟醇氧化物。由于羟基的位置不同，香叶醇与芳樟醇具有相同的化学式，在高温（170°C）下提取。SWE 对香叶醇 (1.22 ± 0.22 mg/g) 和氧化芳樟醇 (0.30 ± 0.09 mg/g) 的效率高于传统萃取方法（己烷、甲醇、热水和加氢蒸馏）。