Kurnakov Institute of General and Inorganic Chemistry of Russian Academy of Sciences, Moscow 119991, Russia.
Molecules. 2020 Apr 25;25(9):2008. doi: 10.3390/molecules25092008.
Accurate collection of extracted material represents a technical problem in supercritical fluid extraction because trapping should be performed in severe conditions of rapidly moving and freezing expanded fluid. We have developed a simple device for effective sample collection in analytical-scale supercritical fluid extraction. The device consists of a cyclone separator equipped with a spray trap and a heated check valve. The cyclone separator and spray trap are manufactured from a light polymer via 3D printing and are quick-detachable, which encourages its use in applications where mass yield measurements are required. The device was compared to a standard tubing-and-vial approach in the task of building kinetic curves for the extraction from two aroma plants, namely, laurel and rosemary. The new device showed almost two-fold increase in extraction trapping, most probably due to better collection of volatile compounds. A curious effect of the number of mass measurement points per curve on apparent yield was observed. An increase in the number of points led to an increase in yield, probably due to the effect of the static-dynamic extract regime posed by the manner in which the device is used.
准确收集提取材料是超临界流体萃取中的一个技术问题，因为捕集应该在快速移动和冷冻膨胀流体的苛刻条件下进行。我们开发了一种用于分析规模超临界流体萃取中有效样品收集的简单装置。该装置由旋风分离器、喷雾捕集器和加热止回阀组成。旋风分离器和喷雾捕集器通过 3D 打印由轻质聚合物制成，并且可以快速拆卸，这鼓励在需要测量质量产率的应用中使用该装置。该装置与标准的管和管瓶方法进行了比较，以构建从两种芳香植物（月桂和迷迭香）中提取的动力学曲线。新装置的萃取捕集效率提高了近两倍，这很可能是由于挥发性化合物的更好收集。观察到每曲线的质量测量点数对表观产率的影响。增加点数会导致产率增加，这可能是由于装置使用方式所产生的静态-动态萃取模式的影响。
