Thin layer distillation for matrix isolation in flow analysis
Thin layer distillation for matrix isolation in flow analysis
复制标题
DOI：
10.1016/j.talanta.2006.12.002
复制
发表时间：
2007-04-30
期刊：
影响因子：
6.1
通讯作者：
Kolev, Spas D.
中科院分区：
文献类型：
--
作者：
Mornane, Patrick;van den Haak, Jeroen;Kolev, Spas D.
在流动注射装置中，研究了薄层蒸馏池中分析物从基质中的转移及其随后的测量。我们设计的细胞，使供体和受体流在平行的通道中流动，由薄的分隔壁分开。基质转移过程涉及将分析物在室温下蒸馏到电化学池的顶部空间中，并随后通过同时流动的受体流冷凝/吸收。不存在膜，因此不存在与膜相关的问题。该系统的设计进行了优化，其尺寸和操作参数。对氨和五种不同胺的渗透汽化流动注射（PFI）系统的产率和灵敏度进行了比较。对于较高分子量的胺，该方法提供了相当或上级的性能。该技术应该是一个有吸引力的在线分析的挥发性化学物质的方法在“脏”的样品，特别是对于挥发性分析物的分子量较高。(c)2006 Elsevier B. V.保留所有权利。
Analyte transfer from the matrix in a thin layer distillation (TLD) cell and its subsequent measurement were investigated in a flow injection configuration. We designed the cell such that the donor and acceptor streams flowed in parallel channels separated by a thin dividing wall. The matrix transfer process involved room -temperature distillation of the analyte into the headspace of the TLD cell and its subsequent condensation/uptake by a concurrently flowing acceptor stream. There are no membranes hence there are no membrane-related problems. The TLD system design was optimized with respect to its dimensions and operational parameters. Throughput and sensitivity were compared with a conventional pervaporation flow injection (PFI) system for ammonia and five different amines. For the higher molecular mass amines, the TLD approach provided comparable or superior performance. The TLD technique should be an attractive approach for online analysis of volatile chemical species in 'dirty' samples, especially for volatile analytes of higher molecular mass. (c) 2006 Elsevier B.V. All rights reserved.