Analytical supercritical fluid extraction of adsorbent materials
Analytical supercritical fluid extraction of adsorbent materials
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吸附材料的分析超临界流体萃取
DOI：
10.1021/ac00128a008
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发表时间：
1987
影响因子：
7.4
通讯作者：
Richard D. Smith
中科院分区：
文献类型：
--
作者：
B. W. Wright;C. Wright;R. Gale;Richard D. Smith
研究了使用超临界流体从各种吸附剂和颗粒基质中分析萃取半挥发性和较高分子量材料。仪器设计允许在高达 400 bar 的压力和 235 /sup 0/C 的温度下提取克量的基质，并将流出物收集在密封的液氮冷却烧瓶中。对二氧化碳、异丁烷和甲醇改性（20 mol%）二氧化碳流体系统进行了评估，并与液体索氏提取进行比较。超临界流体萃取 (SFE) 提供非常快速（约 = 30 分钟）的萃取，其效率与索氏提取方法相当，并且更快速和更高效的萃取似乎是可行的。极性较大的二氧化碳-甲醇流体系统对极性较大的吸附物具有较高的萃取效率，而异丁烷系统对于较高分子量和极性较小的化合物则更有效。
The use of supercritical fluids for the analytical extraction of semivolatile and higher molecular weight materials from various adsorbent and particulate matrices was investigated. Instrumentation was designed to allow gram quantities of the matrix to be extracted at pressures up to 400 bar and temperatures to 235 /sup 0/C with collection of the effluent in a sealed liquid-nitrogen-cooled flask. Carbon dioxide, isobutane, and methanol modified (20 mol %) carbon dioxide fluid systems were evaluated and compared to liquid Soxhlet extraction. Supercritical fluid extraction (SFE) provided very rapid (approx. =30 min) extraction with comparable efficiency to the Soxhlet methods, and both more rapid and more efficient extractions appear feasible. The more polar carbon dioxide-methanol fluid system gave higher extraction efficiencies for the more polar adsorbates and the isobutane system was more efficient for the higher molecular weight and less polar compounds.